Number

Question 1

What is a multiple?

Eg what are the multiples of 6

Answer 1

A number that is in the 6 times table or any table.
( these go on and on)

6,12,18,24,30,36…

Question 2

What is a prime number?

What are the first few prime numbers?

Answer 2

It is a number that has exactly two (different) factors.

These will always be 1 and the number itself. If anything else goes into it it can’t be prime.

2,3,5,7,11,13,17,19,23,29,…

Question 3

What is a factor?

Eg what are the factors of 12?

Answer 3

Numbers in pairs that are multiplied tougher to make that number

Factors of 12 are 1,2,3,4,6,12

Question 4

How do you show that a decimal recurs (repeats)?

Eg 0.666666…

Answer 4

Put a dot above the recurring digit(s)

Zero pint six with a dot above the six

Question 5

When you are doing division and the number doesn’t go exactly what do you carry to the next colum?

Answer 5

The remainder not the number you are dividing by

Question 6

How do you change a decimal into a fraction?

Answer 6

If there’s one decimal digit put it over 10 eg 0.3=3/10
If there’s two decimal digits put it over 100 eg 0.18=18/100=9/50
If there’s three decimal digits put it over 1000 eg 0.123=123/1000

Question 7

How do you change a fraction into a decimal?

Answer 7

If the bottom is already 10 then put the top into the first decimal place eg 7/10=0.7
If the bottom is already 100 then put the top into the first two decimal placed eg 13/100=0.13 3/100=0.03
Etc

If the bottom isn’t 10 or 100 can you change the bottom to be 10 or 100 eg 2/5 can be written as 4/10 double both which equals 0.4
Eg 17/20=85/100 (times top and bottom number by 5) = 0.85

If neither of the above work do the division eg 3/8 means 3 divided by 8. If you do that division the bus stop method and adding .0000 it gives 0.375

Question 8

How do you change a decimal tow a percentage?

Answer 8

Times by a hundred move all the digits two places to the left onto the bigger columns

Question 9

How do you change a percentage into a decimal?

Answer 9

Divide by a hundred move all the digits two places to the right

Question 10

How do you turn a percentage into a fraction?

Answer 10

Put the percentage over a hundred

Then simplify the fraction if you can

Question 11

How do you turn a fraction into a percentage?

Answer 11

If the fraction is over a 100 then the top is the percentage.
If the bottom can be changed into 100 do that then the top is a percentage 3/50 = 6/100 =6%
If nether of these work then do the division to make a decimal then times by 100 eg 3/8 = 0.375 = 37.5%