Fractions

Question 1

Product of a number and its reciprocal is

Answer 1

always 1

Question 2

reciprocal of 0, 0 squared

Answer 2

undefined, 0

Question 3

complex fractions

Answer 3

fractions whose numerator, denominator or both are fractions

Question 4

proper and improper fractions

Answer 4

proper: fractions whose numerator is smaller than denominator - improper is viceverasa

Question 5

comparing the size of the fractions

Answer 5

cross multiplying the nominator with the denominator of the number you are comparing with a/b>c/d if ad>bc
or finding lcm and comapre

Question 6

if the same numerator - bigger the denominator

Answer 6

smaller the fraction

Question 7

decimal points, names

Answer 7

thousand 1,000 hundred 100 tens 10 ones 1 tenths 0,1 hundredths 0,01 thousandths 0,001

Question 8

multiplication with decimals

Answer 8

count the numbers after the dec point of both numbers, remove the decimal point, multiply the numbers, add the decimal point based on the first count

Question 9

percent into fraction

Answer 9

x% = x/100 and then reduce

Question 10

fraction into percent

Answer 10

x/100 * 100= x%

Question 11

decimal into percent

Answer 11

move the decimal point 2 places to the right

Question 12

decimals into fraction

Answer 12

terminal decimal can be converted

1. If the terminating decimal has 1 decimal place write the number over 10 (0,3 -> 3/10)
2. If the terminating decimal has 2 decimal place write the number over 100 (1,47-> 147/100)
3. If the terminating decimal has 3 decimal place write the number over 1000 (0,679-> 679/1000)

Question 13

base fraction

Answer 13

fraction that has 1 as a numerator 1/3, 1/9)

Question 14

knowing the base fraction equivalent can determine the value of other fractions?

Answer 14

1/9 = 0,111
5/9 = 0,111*5= 0,556...

Question 15

squaring and taking square root of a number between 0 and 1

Answer 15

then X^2 < x < root of x

Question 16

When presented with large squared number you can…

Answer 16

square the last digit and the answer has to have the same unit digit

Question 17

perfect square

Answer 17

is a number that can be expressed by multiplying 2 same numbers i.e 25 (55), 9(33)

Question 18

if a number is a perfect square it will have units digit of

Answer 18

0,1,4,5,6,9

Question 19

PEMDAS

Answer 19

parenthesis, exponents, multiplication division, addition subtraction

Question 20

Factorials

Answer 20

if n positive- product of all the numbers from 1 to n included

Question 21

0!, 1!=?

Answer 21

1,1

Question 22

an opposite of a number

Answer 22

2, -2