Is all about sharing and being fair Ratio Is all about sharing and being fair

Ratio is used to share things out when we are being fair. It is also used to tell us how much of one thing there is when compared to another

Ratio What is the ratio of red counters to yellow? We write this as 5 : 3 (5+3=8 and there are 8 counters)

Ratio The ORDER is VERY IMP! Red : Yellow 5 : 3 Yellow : Red 3 : 5 Not the same ratio !

What is the ratio of green counters to blue? 4 : 5

Ratio What is the ratio of red counters to yellow? We could write this as 6 : 2 We could also write it as 3 : 1 ÷2

Ratio We call this simplifying the ratio Just like we simplify fractions, we get the ratio in its simplest form In fact ratio can be a different representation of a fraction, it also shows parts of a whole!

What is the ratio of blue to yellow? 4 : 8 What is the ratio of blue to yellow? 1 : 2

What is the ratio of red to green? 5 : 10 What is the ratio of red to green? 1 : 2

What is the ratio of yellow to blue? 12 : 2 What is the ratio of yellow to blue? 6 : 1

What is the ratio of green to red? 6 : 9 What is the ratio of green to red? 2 : 3

Ratio 1 : 2 2 : 1 1 : 3 3 : 2 Ratios can be: Part to Part  Boys : Girls Girls : Boys Part to Whole  Boys : Children Whole to Part  Children : Girls 1 : 2 2 : 1 1 : 3 3 : 2

5/9 4/9 5 : 4 What is the ratio of blue to yellow? FRACTIONS VS RATIO What fraction is shaded in blue? 5/9 What fraction is shaded yellow? 4/9 What is the ratio of blue to yellow? 5 : 4

Why does simplifying make sense? What is the ratio of apples to oranges? Apples : Oranges 6 : 9 2 : 3

Complete the exercises on the sheet. Ratio It’s your turn!! Complete the exercises on the sheet.