Visit

www.mentalstarters.co.uk

For an ideal collection of Commercial Powerpoint Mental

Starter Resources.

Used in schools throughout the country, these resources are a

bright and colourful way to start your lesson.

© B. Taylor - 2004

Ratios compare quantities

They are usually writtenin their simplest form.

eg: Simplify the ratio 4 : 10

answer: Divide each number in the ratio by 2, to give:

2 : 5

2 is the biggest number which

goes into both of these numbers

Ratios compare quantities

They are usually writtenin their simplest form.

eg: Simplify the ratio 10 : 25

answer: Divide each number in the ratio by 5, to give:

2 : 5

5 is the biggest number which

goes into both of these numbers

Ratios compare quantities

They are usually writtenin their simplest form.

eg: Simplify the ratio 15 : 21

answer: Divide each number in the ratio by 3, to give:

5 : 7

3 is the biggest number which

goes into both of these numbers

Ratios compare quantities

They are usually writtenin their simplest form.

eg: Simplify the ratio 8 : 18

answer: Divide each number in the ratio by 2, to give:

4 : 9

2 is the biggest number which

goes into both of these numbers

Ratios compare quantities

They are usually writtenin their simplest form.

eg: Simplify the ratio 35 : 56

answer: Divide each number in the ratio by 7, to give:

5 : 8

7 is the biggest number which

goes into both of these numbers

To make comparisons,we can write ratiosin the form 1 : n.

eg: Write the ratio 4 : 10

in the form 1 : n

answer: Divide each number in the ratio by 4, to give:

1 : 2.5

We divide both

numbers in the ratio by

the first number

To make comparisons,we can write ratiosin the form 1 : n.

eg: Write the ratio 3 : 21

in the form 1 : n

answer: Divide each number in the ratio by 3, to give:

1 : 7

We divide both

numbers in the ratio by

the first number

To make comparisons,we can write ratiosin the form 1 : n.

eg: Write the ratio 8 : 34

in the form 1 : n

answer: Divide each number in the ratio by 8, to give:

1 : 4.25

We divide both

numbers in the ratio by

the first number

To make comparisons,we can also write ratios

in the form n : 1.

eg: Write the ratio 4 : 10

in the form n : 1

answer: Divide each number in the ratio by 10, to give:

0.4 : 1

We divide both

numbers in the ratio by the second

number

To make comparisons,we can also write ratios

in the form n : 1.

eg: Write the ratio 8 : 32

in the form n : 1

answer: Divide each number in the ratio by 32, to give:

0.25 : 1

We divide both

numbers in the ratio by the second

number