Number 2

Question 1

How do you simplify a fraction?

Answer 1

Divide the top and bottom by the same number until they won’t divide any more

Question 2

Round 465 to the nearest 10

Answer 2

470

Question 3

What is the value of 1,sup.18</sup> ?

Answer 3

1

Question 4

What is the first step in multiplying two mixed numbers?

Answer 4

Change them both into improper fractions

Question 5

Which digit in
0.1035
is the second significant figure?

Answer 5

The second zero

Question 6

How do you multiply two numbers in standard form?

Answer 6

Multiply the numbers together
and
add the powers on the 10’s

Question 7

What is the first thing you need to do to add 3/8 and 1/6 ?

Answer 7

Find equivalent fractions using a common denominator

Question 8

What is 0.53 as a fraction?

Answer 8

53/100

Question 9

What is meant by the error interval when a number has been rounded?

Answer 9

The range of values the actual value could have taken before rounding

Question 10

How do you raise a fraction to a power?

Answer 10

Apply the power to both the top and the bottom of the fraction
e.g.
(5/8)² = 25/64

Question 11

Evaluate 2/5 + 1/3

Answer 11

2/5 + 1/3

= 6/15 + 5/15

= 11/15

Question 12

Round 2.498 to 2 decimal places.

Answer 12

2.50

Question 13

True or False?
A fraction is in its simplest form if the numbers on the top and bottom of the fraction have no common factors?

Answer 13

True

Question 14

What is the value of 5⁰ ?

Answer 14

1

Question 15

What is the symbol for ‘approximately equal to’ ?

Answer 15

≈

Question 16

What do you need to do to write one number as a fraction of another?

Answer 16

Write the first number over the second number.
Cancel down if you can

Question 17

What is 20% as a decimal?

Answer 17

0.2

Question 18

Is 12 x 10⁴ in standard form?

Answer 18

No the first number has two digits before the decimal point

Question 19

A length is rounded to the nearest centimetre.
Up to how much bigger could the actual value be than the rounded value?

Answer 19

Half a centimetre

Question 20

What are the square roots of 36 ?

Answer 20

6 and -6

Question 21

How do you divide two powers of the same number?

Answer 21

Subtract the powers

Question 22

x = 4.7 rounded to the first decimal place.
What is the error interval for x ?

Answer 22

4.65 ≤ x < 4.75

Question 23

What is 3½ as an improper fraction?

Answer 23

7/2

Question 24

What is the first thing you should do to order fractions?

Answer 24

Rewrite the fractions with a common denominator

Question 25

How do you estimate an answer to a calculation?

Answer 25

Round all the numbers to 1 significant figure, then do the calculation with the rounded numbers

Question 26

How do you convert a decimal to a percentage?

Answer 26

Multiply by 100

Question 27

True or False? If the digit after the place you are rounding to is a 5, the last digit in the rounded number stays as it is.

Answer 27

False the last digit is rounded up (increased by 1)

Question 28

If a number is in standard form, between which two values should its first number be?

Answer 28

1 ≤ x < 10

Question 29

What is the first step in multiplying two improper fractions?

Answer 29

Multiply the tops and bottoms separately

Question 30

What do you need to do to the powers to work out (8²)⁴ ?

Answer 30

Multiply them. (8²)⁴ = 8⁸

Question 31

What do you need to do to convert a fraction into a decimal?

Answer 31

Divide the top by the bottom

Question 32

What is the integer part when 28/3 is converted into a mixed number?

Answer 32

9

Question 33

How do you multiply two powers of the same number?

Answer 33

Add the powers

Question 34

What is the first significant figure of a number?

Answer 34

The first digit that is not a zero

Question 35

What do you do when you divide fractions?

Answer 35

KFC Keep the first fraction Flip the second fraction upside down Change the '÷' for a 'x' (and multiply)

Question 36

What do you do first when you add to numbers that are in standard form?

Answer 36

Change them into ordinary numbers

Question 37

How do you find a fraction of a number?

Answer 37

Divide the number by the bottom of the fraction, and then multiply the result by the top

Question 38

What is 13.685 rounded to 1 decimal place?

Answer 38

13.7

Question 39

16.2 x 7.7 is estimated by calculating 20 x 8. Will this be an underestimate or overestimate?

Answer 39

Overestimate Both numbers in the estimate are bigger than the original numbers

Question 40

When a number is rounded to the nearest 100, its value is 700. What is the minimum value of the original number?

Answer 40

650