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Grade 7 Term 2 exams > MATHS > Flashcards

MATHS Flashcards

1
Q

What are natural numbers?

A

All the positive numbers 1; 2; 3; 4; … are called the set of natural numbers

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2
Q

What are whole numbers?

A

Natural numbers including 0

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3
Q

What is often used to make calculation easier.

A

rounding off

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4
Q

Addition means….

A

finding the sum (adding the numbers together)

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5
Q

What is a factor?

A

A factor is a number that divides exactly into a whole number and leaves no
remainder.

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6
Q

What is a prime number?

A

Prime numbers are numbers that have only two factors, themselves and 1. T

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7
Q

What is a composite number?

A

Numbers with more than two factors are called composite numbers

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8
Q

Is the number 1 a prime number or a composite number?

A

The number 1 is neither a prime number nor a composite number

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9
Q

What does ‘ascending’ mean?

A

Smallest to biggest

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10
Q

What does ‘descending’ mean?

A

Biggest to smallest

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11
Q

< means

A

less than

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12
Q

> means

A

more than

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13
Q

What is the inverse operation of multiplication?

A

Division

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14
Q

What is the inverse operation of addition?

A

Subtraction

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15
Q

Adding numbers is called finding the….

A

Sum

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16
Q

Subtracting numbers is called finding the….

A

Difference

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17
Q

Multiplying numbers is called finding the….

A

Product

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18
Q

Dividing numbers is called finding the ….

A

Quotient

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19
Q

What is the commutative property of 2+7?

A

7+2

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20
Q

What is the commutative property of 3x6

A

6x3

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21
Q

What is the commutative property for 9 divided by 3?

A

Commutative property does not work with division

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22
Q

What is the commutative property of 8 - 4?

A

Commutative property does not work with subtraction

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23
Q

What is the associative property of 5 + ( 2 + 3)

A

(5 + 2) +3

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24
Q

What is the associative property of 6 - (1 + 3 )

A

(6 - 1 ) +3

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25
Q

What is the associative property of 4 x (2 x 2)

A

(4 x2) x 2

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26
Q

What is 54 x 100

A

5400

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27
Q

What is the identity element for subtraction and addition?

A

0
Whether you add or subtract 0 from a number, the number never changes

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28
Q

What is the identity element of multiplication and division?

A

1
Whether you multiply or divide a number by 1, the number never changes

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29
Q

What are odd numbers?

A

Numbers that cannot be divided by 2

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30
Q

What are even numbers?

A

Numbers that can be divided by 2

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31
Q

What are the first 5 counting numbers? (Whole numbers)

A

0 1 2 3 4

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32
Q

What are the first 5 natural numbers?

A

1 2 3 4 5

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33
Q

What are the first 6 multiples of 10?

A

10
20
30
40
50
60

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34
Q

What are the factors of 10?

A

1, 2, 5, 10

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35
Q

What are the prime factors of 12?

A

2, 3,

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36
Q

Round off 171 643 to the nearest thousand

A

172 000

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37
Q

Round off 166.16 to the nearest whole number

A

166

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38
Q

Use your knowledge about distributive property to solve:
29 x 4 + 29 x 7 + 29 x 10

A

(30 x 4 - 4) + (30 x 7 - 7) + (30 x 10 - 10)
116 + 203 + 290
500 + 100 + 9
609

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39
Q

Use your knowledge about distributive property to solve:
450 ÷ 10 + 680 ÷ 10

A

450 / 10 + 680 / 10

= (450 + 680) /10
= 1130 / 10
= 113

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40
Q

Use your knowledge about distributive property to solve:
50 x 369

A

50 x 369

= (100 x 369) / 2
= 36900 / 2
= 15 000 + 3000 + 450
= 18 450

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41
Q

True or false?
8 + 7 = 7 + 8

A

True

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42
Q

True or False?
10 x (7 +3 +4) = (10 x 7) + (10 x 3) + (10 x 4)

A

True

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43
Q

True or False?
(2 500 ÷ 20) ÷ 5 = 2 500 ÷ (20 ÷ 5)

A

False
(2500 / 20) / 5 = 125 / 5 = 25

2500 / (20/5) = 2500 / 4 = 625

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44
Q

A grocer buys 480 trays of oranges. He has to share the oranges equally
between 20 clients.
What is your equation?

A

480 / 20
480 / 10 / 2
48 / 2
24

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45
Q

Mr Padaychee owns a clothing shop. He has 25 designer tops which he sells for
R69 each. Assuming Mr Padaychee sells all of the tops,
What is your equation?

A

25 x 69
25 x 70 - 25
25 x 10 x 7 -25
250 x 7 - 25
250 x 10 - (250 x 3) - 25
2500 - 750 - 25
2500 - 775
2000 - 275
R 1725.00

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46
Q

Use the HORIZONTAL METHOD.
a) 456 +350 + 239

A

400 + 300 + 200 +50 + 50 + 30 + 6 + 9
900 + 100 + 30 + 10 + 5
1045

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47
Q

Use the HORIZONTAL METHOD.
a) 1 226 x 82

A

(1000 x 80) + (200 x 80) + (20x 80) + (6 x 80) + 2000 + 400 + 40 + 10 + 2
80 000 + 10 000 + 6000 + 1000 + 600 + 400 + 80 + 2000 + 400 +40 +10 + 2
90 000 + 9000 + 1000 + 400 + 100 + 30 + 2
100 532

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48
Q

What is the order of operations?

A

Brackets
Operations
Division
Multiplication
Addition
Subtraction

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49
Q

Calculate the following:

2(5 + 2) - (3 / 3) x 2 - 4 + 3 x 2 x 10 / (6 - 1)

A

(2 x 7) - (1 x 2) - 4 + (3 x 2 x 10 ) / 5
14 - 2 - 4 + (60 / 5)
8 + 12
20

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50
Q

True or False?
16 + 4 x 5 = 100

A

False

16 + 4 x5
= 16 + (4 x 5)
= 16 + 20
= 36

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51
Q

What is the product of 3 and 2?

A

6

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52
Q

What does HCF stand for?

A

Highest Common Factor

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53
Q

What does LCM stand for?

A

Lowest Common Multiple

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54
Q

What is the HCF of 12 and 20

A

Factors of 12 are: 1, 2, 3, 4, 6, 12
Factors of 20 are: 1, 2, 4, 5, 10, 20
HCF is 4

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55
Q

What is the LCM of 6 and 8?

A

Multiples of 6 are: 6, 12, 18, 24, 30, 36, 42…..
Multiples of 8 are: 8, 16, 24…..
LCM is 24

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56
Q

A comparison between two numbers or two quantities that are measured in the
same units. For example: The ratio of the original price of the coat for the sale price is
R300: R210. We simplify this to 10 : 7
What is this called?

A

The Ratio

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57
Q

What is the Ratio for 250ml of juice concentrate for every litre of water?

A

250ml : 1L
= 250ml : 1000ml
= 25 : 100
= 5 : 20
= 1 : 4

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58
Q

What do we call the difference between the selling price added and the cost price of an
article.

A

The Profit

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59
Q

If It costs me R 20 to make a dozen cupcakes and I sell each cup cake for R5
What is my profit?

A

(5 x 12) - 20
= 60 - 20
= 40

My profit is R40

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60
Q

What is the equation to work out profit?

A

Selling Price - Cost Price = Profit
or
Selling Price - Expenses = Profit

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61
Q

What is an easier way to work out the HCF of bigger numbers?

A

Using Prime Factorization

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62
Q

Using Prime Factorization, work out the HCF of 60 and 72

A

60 = 3 x 20 = 3 x 5 x 4 = 3 x 5 x 2 x 2
72 = 2 x 36 = 2 x 3 x 12 = 2 x 3 x 3 x 4 = 2 x 3 x 3 x 2 x 2

2 x 2 x 3 x 5
2 x 2 x 2 x 3 x 3

2 x 2 x 3 = 12

The HCF is 12

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63
Q

What is an easier to work out what the LCM of bigger numbers is?

A

By Multiplying all the Prime factors that either each number has.

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64
Q

Using Prime Factorization, work out the LCM of 60 and 72

A

60 = 2 x 30 = 2 x 2 x 15 = 2 x 2 x 3 x 5
72 = 2 x 36 = 2 x 2 x 18 = 2 x 2 x 2 x 9 = 2 x 2 x 2 x 3 x 3

60 = 2 x 2 x 3 x 5
72 = 2 x 2 x 2 x 3 x 3

2 x 2 x 2 x 3 x 3 x 5
= 8 x 9 x 5
= 72 x 5
= 360

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65
Q

Two lighthouses can be seen from the top of a hill.
The first flashes once every 8 seconds, and the other flashes once every 15 seconds.
If they flash at the same time, how long will it be until they flash at the same time
again?

A

Find the LCM of 8 and 15

8 = 2 x 4 = 2 x 2 x 2
15 = 3 x 5

2 x 2 x 2 x 3 x 5
= 8 x 3 x 5
= 24 x 5
= 120

They will at the same time after 120 seconds / 2 minutes

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66
Q

Find the HCF of 30 and 24 using Prime Factorization

A

30 = 2 x 15 = 2 x 3 x 5
24 = 2 x 12 = 2 x 3 x 4 = 2 x 3 x 2 x 2

2 x 3 x 5
2 x 2 x 2 x 3

2 x 3 = 6

HCF = 6

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67
Q

Using Prime Factorization, find the LCM of 50 and 60

A

50 = 2 x 25 = 2 x 5 x 5
60 = 3 x 20 = 3 x 5 x 4 = 3 x 5 x 2 x 2

2 x 5 x 5 x 3 x 2
= 10 x 15 x 2
= 300

The LCM is 300

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68
Q

Using Prime Factorization, find the HCF of 26 and 45

A

26 = 2 x 13
45 = 5 x 9 = 5 x 3 x 3

26 and 45 have no prime factors in common
so

The HCF is 1

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69
Q

Using Prime Factorization, find the LCM of 26 and 45

A

26 = 2 x 13
45 = 5 x 9 = 5 x 3 x 3

2 x 13
3 x 3 x 5

2 x 3 x 3 x 5 x 13
= 18 x 5 x 13
= 90 x 13
= 1170

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70
Q

A number that shows how many times a base is used as a factor is called an….

A

Exponent

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71
Q

What are the first 5 square numbers?

A

1 x 1 = 1
2 x 2 = 4
3 x 3 = 9
4 x 4 = 16
5 x 5 = 25

The first 5 square numbers are:
1, 4, 9, 16, 25

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72
Q

What are the first 5 cube numbers?

A

1 x 1 x 1 = 1
2 x 2 x 2 = 8
3 x 3 x 3 = 27
4 x 4 x 4 = 64
5 x 5 x 5 = 125

The first 5 cube numbers are:
1, 8, 27, 64, 125

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73
Q

A base together with an exponent is called a …..

A

Power

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74
Q

What is 2 to the power of 5?

A

2 x 2 x 2 x 2 x 2
= 4 x 4 x 2
= 16 x 2
= 32

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75
Q

the inverse operation of squaring a number is called….

A

The square root

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76
Q

What is the square root of 25?

A

5 x 5 = 25
so the square root of 25
is 5

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77
Q

√9 =

A

=3

because 3 x 3 = 9

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78
Q

What is the cube root of 8?

A

= 2

because 2 x 2 x 2 = 8

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79
Q

If you multiply a number by itself the answer is …….

A

a square number

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80
Q

If you multiply a number by itself two times the answer is ……

A

a cube number

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81
Q

Write 8 in exponent form

A

2 (cubed) *write it down correctly

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82
Q

Write 9 in exponent form

A

2 (squared) *write it down correctly

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83
Q

5 squared is read as …
and calculated as …..

A

5 to the power of 2

5 x 5 = 25

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84
Q

5 cubed is read as….
and calculated as….

A

5 to the power of 3

5 x 5 x 5 = 125

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85
Q

A base together with a power is called….

A

An exponent

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86
Q

Write the following in exponential form
2x2x2x2

A

2 to the power of 4

Write it down correctly

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87
Q

What is the square of 5?

A

25

(5 x 5 = 25)

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88
Q

What is the cube root of 8000?

A

20

(20 x 20 x 20 = 8000)

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89
Q

What is the cube of 1?

A

1

(1 x 1 x 1 =1)

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90
Q

Use prime factors to write numbers in exponential form

72

A

72 = 2 x 36 = 2 x 2 x 18 = 2 x 2 x 2 x 9 = 2 x 2 x 2 x 3 x 3

= 2 cubed x 3 sq

91
Q

Use prime factors to write numbers in exponential form

125

A

125 = 5 x 25 = 5 x 5 x 5

= 5 cubed

92
Q

Use prime factors to write numbers in exponential form

256

A

256 = 2 x 128 = 2 x 2 x 64 = 2 x 2 x 2 x 32 = 2 x 2 x 2 x 2 x 16
= 2 x 2 x 2 x 2 x 2 x 8
= 2 x 2 x 2 x 2 x 2 x 2 x 4
= 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2

= 2 to the power of 8

93
Q

Use prime factors to write numbers in exponential form

588

A

588 = 2 x 294 = 2 x 2 x 147 = 2 x 2 x 7 x 21 = 2 x 2 x 7 x 3 x 7

= 2 sq x 3 x 7 sq

94
Q

use the exponential form of numbers to calculate the square root of
81

A

81 = 9 x 9
= 9

95
Q

use the exponential form of numbers to calculate the cube root of:

(2 to the power of 6) x (3 cubed)

A

( 2 x 2 x 2 x 2 x 2 x 2 ) x ( 3 x 3 x 3)

= ( 4 x 4 x 4) x ( 3 x 3 x 3)

= 4 x 3

= 12

96
Q

The square root of a number multiplied by itself is equal to

A

the number

EG. the square root of 25 is 5
Multiplied by 5
= 25

97
Q

Calculate (7+3) squared

A

(7+3) squared

= 10 squared
= 10 x 10
= 100

98
Q

Calculate (7-3)cubed

A

(7-3) cubed

=4 cubed
= 4 x 4 x 4
= 16 x 4 or 16 x 2 x 2
= 64

99
Q

What is the square root of (16+9)

A

(16 + 9) = 25

5 x 5 = 25
The sq root of 25 = 5

100
Q

What is the square root of (16 x 9)

A

16 x 9 = ( 4 x 4 ) x ( 3 x 3)

Sq root is 4 x 3
= 12

101
Q

Calculate 5squared + 5 - 2cubed

A

(5 x 5) + 5 - (2 x 2 x 2)
25 + 5 - 8
30 - 8
22

102
Q

Calculate 3squared - the cube root of 27 + 12squared

A

( 3 x 3 ) - ( 3 ) + ( 12 x 12)

= 9 - 3 + 144
= 6 + 144
= 150

103
Q

calculate:
2 cubed + 2 to the power of 4 + 2 to the power of 5

A

(2x2x2) + (2x2x2x2) + (2x2x2x2x2)
8 + 16 + 32
=56

104
Q

Calculate:
(2 to the power of 5) ÷ (2 cubed) ÷ (2 to the power of 1)

A

(2x2x2x2x2) / (2x2x2) / 2
32 / 8 / 2
4 /2
= 2

105
Q

Simplify the ratio
24 : 60 : 84

A

Prime Factors of 24: 2x12 = 2 x (2x6) = 2 x (2x2x3)
Prime Factors of 60: 2x30 = 2 x (2x15) = 2 x (2x2x3x5)
Prime Factors of 84: 2x44 = 2 x (2x22) = 2 x (2x2x2x11)

2x2x3 = 12

HCF = 12

24 /12 = 2
60/12 = 5
84/12 = 7

Simplified Ratio is:

2:5:7

106
Q

Simplify the Ratio:
40 m : 2km

A

40 m : 2km = 40m: 2000m

4:200
2:100
1:50

107
Q

A chef bakes a dozen cookies in 20 minutes. How many cookies does he bake in 3
hours?

Calculate the Rate

A

12 cookies per 20 minutes
20 x 3 = 60 minutes = 1 hour
12 x 3 = 36 cookies per hour

36 x 3 = 108 cookies in 3 hours

108
Q

A butcher sells 15 kg of mince for R900,00. How much does the mince cost per
kilogram?

What is the price rate of mince /kg

A

900 / 15
R60 per kg

109
Q

Share R 2 250,00 in the ratio 3:2:1

A

2 250 / 6
375 x 6 = R 2 250
3 x 375 = R 1 125
2 x 375 = R 750
1 x 375 = R 375

R 1 125 : R 750 : R 375

110
Q

Divide R 200,00 between you and your best friend in the ratio 3:2

A

There are 5 parts (3:2) 3+2=5

1 part is R 200 / 5 = R 40

R 40 x 3 = R 120
R 40 x 2 = R 80

I get R 120 and my friend gets R 80

111
Q

Share an inheritance of R 50 000,00 between five children in the following ratio
7:9:3:2:4

A

7 + 9 + 3 + 2 + 4 = 25 parts

R 50 000.00 divided by 25 parts = R 2 000 per part

a) R 2 000 x 7 = R 14 000
b) R 2 000 x 9 = R 18 000
c) R 2 000 x 3 = R 6 000
d) R 2 000 x 2 = R 4 000
e) R 2 000 x 4 = R 8 000

112
Q

Increase R 1 500 by 25%

A

(1500 x 25) / 100 + 1500

37 500 / 100 = 375

1500 + 375 = R 1 875

113
Q

Decrease R 3 000 by 45%

A

3000 - (3000 x 45)/100
3000 - 135000 / 100
3000 - 1350
= R 1 650.00

114
Q

When calculating VAT, what % of the article’s value must be added to the cost of the
article ?

A

15%

115
Q

Calculate the VAT to be added on an article costing R 500

A

500 x 15 / 100 + 500
(500 x 10 + 500 x 5) / 100 + 500
(5000 + 2500) / 100 +500
7500 / 100 +500
75 + 500
= R 575

The Vat to be added on is R 75

116
Q

What is added to the value of an article, normally when credit is given and the buyer
cannot pay the full amount.

A

Interest

117
Q

Calculate what you will pay for an item costing R 250,00 if a discount of 15% is given.

A

250 - 250 x 15 / 100
250 - (250 x 10 + 250 x 5) / 100
250 - (2 500 + 1 250) / 100
250 - 3750 / 100
250 - 37.5
R 212.50

118
Q

What is the LCD stand for?

A

Lowest Common Denominator

119
Q

Use the lowest common denominator (LCD) and equivalent fractions,
making each fraction have the same denominators.

1/2
1/3
1/6
2/3
3/4

A

Denominators are:

2, 3, 6, 3, 4

The LCD is 12
Multiply all numerators and denominators by X to make the denominators 12

1/2 x 6/6 = 6/12
1/3 x 4/4 = 4/12
1/6 x 2/2 = 3/12
2/3 x 4/4 = 8/12
3/4 x 3/3 = 9/12

120
Q

What are the following fractions in ascending order:

1/2
1/3
1/6
2/3
3/4

A

1/6
1/3
1/2
2/3
3/4

121
Q

Convert 1/5 into a decimal fraction

A

1/5 = 2/10
= 0.2

122
Q

Convert 0.65 into a common fraction

A

0.65 = 65/100
Simplify - (65 / 5)/(100/5)
= 13/20

123
Q

Convert 0.8 into a common fraction

A

0.8 = 8/10
Simplify
(8/10) / (2/2)
= 4/5

124
Q

Convert 1.25 into an improper fraction

A

1.25 = 125/100
(125/100) / (25/25)
= 5/4

Note: improper fraction the numerator is more than the denominator

125
Q

Convert 3.4 into a mixed fraction

A

3.4 = 34/10
= 30 + 4/10
Simplify
30 + (4/10) / (2/2)
30 2/5

126
Q

Convert 18/5 into a decimal fraction

A

18/5 = 3 3/5
= 3 (3/5) x 2/2)
= 3 6/10
= 3.6

127
Q

Convert 7/2 into a mixed fraction

A

3 1/2

128
Q

Convert 8/10 into a percentage

A

100 / 10 x 8
= 10 x 8
= 80%

129
Q

Convert 3/4 into a percentage

A

100 / 4 x 3
= 25 x 3
= 75%

130
Q

Convert 1/1 into a percentage

A

100%

131
Q

Convert 0.223 into a percentage

A

22.3%

132
Q

Which fraction is more?

1/3 or 4/10

A

1/3 x 10/10 = 10/30
4/10 x 3/3 = 12/30

4/10 is more than 1/3

133
Q

Which fraction is less?

4/7 or 2/3

A

4/7 x 3/3 = 12/21
2/3 x 7/7 = 14/21

4/7 is less than 2/3

134
Q

Which fraction is more?

15/30 or 12/24

A

Both fractions are equal

135
Q

James wants to buy a new pair of basketball shoes.
Two shops stock the shoes, and he is very lucky because both shops are having sales on the shoes he wants.
The original price of the shoes is R500. One shop offers a saving of
2/3 off the price, the other offers a saving of
7/12 off the price. Which store offers the best saving?

A

Work out the answer

136
Q

What is 1/3 + 3 2/3 + 3/3

Write your answer as a improper fraction

A

1/3 + 3/1 + 2/3 + 3/3
1/3 + 9/3 + 2/3 + 3/3
= 15/3

137
Q

what is 5.2 + 1.1 + 0.6?

Write your number as a mixed fraction in the simplest form

A

Work out the answer

138
Q

What is 2/3 + 2 3/5 + 7/10

Write your answer in the simplest form

A

Work out your answer

139
Q

What is 3 2/3 - 2 1/2

Write your answer in the simplest form as a fraction

Write your answer a a whole number with decimal

A

Work out your answer

140
Q

When multiplying fractions, what is the rule?

A

Numerators get multiplied with numerators and denominators get multiplied with
denominators.

141
Q

Calculate:

2/3 x 4/5

Write your answer as a fraction in the simplest form

Write your answer in decimal form

A

Work out your answer

142
Q

What is 8/10 x 1/2

Write your answer as a fraction in the simplest form

Write your answer in decimal form

A

Work out the answer

143
Q

What is the rule for dividing fractions

A

Numerator x Denominator = Numerator
Denominator x Numerator = Denominator

144
Q

Calculate:

(1 4/5 / 2/3)

A

Work out your answer

145
Q

Calculate:

(1/2) / (1/3)

A

Work out your answer

146
Q

Calculate:

3/2 x 2

A

Work out your answer

147
Q

Calculate:

(2/9) / 3

A

Work out your answer

148
Q

What is 32 % of R250?

A

Calculate

149
Q

At the beginning of 2015, bread cost R 10, 00 per loaf. 1 year later, the same loaf of
bread cost R 12, 00. By what percentage did the price of bread increase?

A

Calculate

150
Q

This is a number that has a decimal comma that is used to separate whole
parts of the number, from the parts that are represented over a multiple of 10

A

Decimal Number

151
Q

The position of a digit to the right of a decimal point. Each successive position
to the right has a denominator of an increased power of 10.

A

Decimal Place

152
Q

Reducing the number of decimal places according to the instruction or the
convention that is being worked with. To round off correctly, look at the first
digit that will not be used in the final answer; if it is 5 or greater then we
round up; if it is 4 or less we round down.

A

Rounding Off

153
Q

An improper fraction written partly as a whole number and partly as a proper
fraction

A

Mixed Number / Mixed Fraction

154
Q

0,31425
Rounded to 2 decimal places:

A

0.31

155
Q

0,31425
Rounded up to 4 decimal places:

A

0.3143

156
Q

Compare 0,534 and 0,552

A

0.534 is less than 0.552

157
Q

3,2 + 1,45

A

Calculate

158
Q

4,291 + 5,64

A

Calculate

159
Q

5, 12 – 2, 452

A

Calculate

160
Q

3,21 × 10

A

3.21

161
Q

4.192 x 100

A

= 419.2

162
Q

4, 62 x 3

A

Calculate

163
Q

2, 43 x 0,6

A

Calculate

164
Q

34, 21 ÷ 100

A

0.3421

165
Q

34, 21 ÷ 1000

A

0.03421

166
Q

48, 24 ÷ 3

A

Calculate

167
Q

0, 62 ÷ 0, 2

A

Calculate

168
Q

I sold 4.5 cakes at R 20.40 per cake.
How much money did I make?

A

Calculate

169
Q

The number/value that was chosen to replace the variable in an expression

A

Input

170
Q

is dependent on the input – it is the answer once the operation
has been performed according to the expression given.

A

OUtput

171
Q

A mathematical sentence built from an algebraic expression using an equal
sign

A

Equation

172
Q

A diagram representing a sequence of movements to be performed on a
given value

A

Flow Diagram

173
Q

A letter used to replace a number that can represent a variety of different
values

A

Variable

174
Q

A value that remains the same and does not vary

A

Constant

175
Q

Five primary schools each get 5 new learners in Grade 7

What would the Input be?
What is the rule?
What would the output be?

A

The original number of learners in each school would be the INPUT

The Rule would be “+5”

The new number of learners in each school would be the OUTPUT

176
Q

How many rules would there be in a flow diagram with multiple operations:

A

However many operations are in the flow diagram

177
Q

The name given to flat shapes that occupy a space and thus have area that
can be calculated.

A

Two-Dimensional (2-D)

178
Q

A polygon whose sides are all the same length, and whose angles are all the
same size.

A

Regular Polygon

179
Q

A polygon that does not have sides that are the same length, nor are the
angles the same size

A

Irregular Polygon

180
Q

A shape that is equilateral has all its sides the same length.

A

Equilateral

181
Q

The distance around a polygon.

A

Perimeter

182
Q

An expression or equation that is used to express the relationship between
certain quantities.

A

Formula

183
Q

The surface of a shape or object. It can also be defined as the number of
square units that a shape covers.

A

Area

184
Q

An irregular shape that is made up of parts or whole components of other
shapes.

A

Composite Shape

185
Q

How does one find the perimeter of a square?

A

The length of all 4 sides are added together

186
Q

What is the perimeter of a square with sides that are 2.5cm?

A

2.5 + 2.5 + 2.5 + 2.5
= 10cm

187
Q

How does one find the area of a square or a rectangle?

A

By multiplying the length by the breadth

188
Q

Work out the area of a room where the
Length is 2.5m and the breadth is 1.2m

A

Calculate

189
Q

How does one work out the perimeter of a triangle?

A

The length of all 3 sides are added together

190
Q

How does one calculate the area of a triangle?

A

the base is multiplied by the perpendicular height then
multiplied by half

191
Q

Work out the area of some triangles.

A

Calculate

192
Q

When dealing with more unusual shapes, how would one work out the area?

A

they need to broken up into one or more of
the more familiar shapes in order to find the area or the perimeter of them

193
Q

Work out the area of an unusual shape

A

Calculate

194
Q

Convert 7cm to mm

A

x10
70mm

195
Q

convert 85mm into cm

A

/ 10
8.5cm

196
Q

convert 30cm into m

A

/ 100
0.3m

197
Q

convert 156mm into m

A

/ 1000
0.0156m

198
Q

convert 153m into km

A

/1000
0.153km

199
Q

convert 950 000 cm to km

A

/ 100 / 1000
/ 100 000
9.5km

200
Q

What is the area of a square with sides 100cm x 100cm

A

1m sq

201
Q

What is the area of a room 200cm x 200cm?

A

4m sq

202
Q

What is a cube?

A

A 3D figure with 6 identical square faces

203
Q

A solid object with 2 identical ends and flat sides. The cross section is the same
all along the length

A

A Prism / Polyhedron

204
Q

A prism made of 6 rectangular faces

A

A rectangular Prism

205
Q

A special type of polyhedron. It has a polygon base and the other faces are
triangles that meet at an apex

A

Pyramid

206
Q

These are figures that do not lie in a plane. The figures have length, breadth and
height or depth.

A

3 Dimensional (3-D)

207
Q

The flat surface or side of a solid shape

A

Face

208
Q

the intersections of the faces of a solid figure

A

Edge

209
Q

The corner of a solid shape. The point where the edges meet

A

Vertex

210
Q

The highest point or peak of a pyramid.

A

Apex

211
Q

The sum of the areas of each of the faces of a 3D shape

A

Surface Area

212
Q

The amount of space contained inside a shape. That means volume is the space
that can be filled with other items

A

Volume

213
Q

What is volume measured in

A

Cubic units

214
Q

What is area measured in

A

Square Units

215
Q

The amount of liquid that a 3D shape can hold. It is measured in ml or l

A

Capacity

216
Q

A 2D pattern that folds to form a 3D shape. It is helpful when calculating
surface area as it makes all faces visible, so that they are not omitted from the
calculation.

A

Net

217
Q

Consider a box:
The length is 10cm, the breadth is 4cm and the height is 7cm.

What do we call this 3-d Object?

A

A rectangular Prism

218
Q

Consider a box:
The length is 10cm, the breadth is 4cm and the height is 7cm.

Work out the surface area

A

Calculate

219
Q

What is the formula to work out the volume of a cube or rectangular prism?

A

L x B x H

220
Q

Convert the following volumes to the capacity:
1 cm3
1000 cm3
1 m3

A

1cm cubed = 1ml
1000 cm cubed = 1L
1m cubed = 1 kl

221
Q

Find how many litres of water the tank can hold.
The dimensions are 110cm x 45 cm x 60cm high

A

Calculate

222
Q

Practice Division equations

A

Calculate

223
Q

Practice Multiplication Equations

A

Calculate

Grade 7 Term 2 exams (13 decks)

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