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How to divide or multiply by 10s, 100s, 1000s

When dividing a number, the number gets smaller. So, the decimal point moves towards the left. However, when you are multiplying a number, the num...

Answered by Adila M. • Maths tutor

3608 Views

How many thirds are there in 9?

To understand the question, we have to know what a third is. 1 is made up of three thirds (3/3 presented in a fraction), so in order to obtain 9 we must multiply it by 3. The answer is 27.

Answered by Kasha A. • Maths tutor

3668 Views

Chloe has 3 pieces of wool. One piece is 160mm long, another is 26cm long and the last piece is 0.45m long. What is the total length of wool, in centimetres, that Chloe has?

The question is asking us to give our answer in centimetres, so the first step to solve this problem will be to convert all the lengths into centimetres. 1cm = 10mm so 160mm = 160/10 =

Answered by Fizza A. • Maths tutor

3554 Views

I think of a number. I multiply it by 3 and then subtract 5. I get an answer of 16. What was the number I first thought of?

This question is asking us to work our way back and find the original number. We can refer to this number as 'x'. If we multiply x by 3 we get 3x. The next step is to subtract 5, so our equation now is 3x...

Answered by Fizza A. • Maths tutor

19125 Views

If 3 apples cost £1.50 and 4 oranges cost £3.20, how much do 5 apples and 3 oranges cost?

The answer is £4.90 and we know that this is the case because...If 3 apples cost £1.50, then one apple costs 50p and then 5 apples are 5 x 50p which is £2.50If 4 oranges cost £3.20 then one orange is £0.8...

Answered by Chris H. • Maths tutor

5185 Views