Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Ratio in maths

1,572 views

Published on

Learn an teach powerpoint.

Published in: Education
  • Be the first to comment

  • Be the first to like this

Ratio in maths

  1. 1. Objective Be able to divide a quantity into a given ratio
  2. 2. Ratio: What does this mean? A steel alloy rod is made up of 60% iron and 40% copper. So the ratio of iron to copper is 60:40. We could simplify this to give 3:2 Ratio is used to compare the sizes of two (or more) quantities. For example: a drink is made by mixing two parts orange juice with five parts water. This relationship of 2 to 5 can be written as the ratio 2:5.
  3. 3. Dividing a quantity in to a ratio Divide 560kg in the ratio 3:4 Total parts 1 part parts parts 3 + 4 = 7 560 ÷ 7 = 80 3 4 3 x 80 = 240kg 4 x 80 = 320kg Divide 560kg in the ratio 3:4 is 240kg:320kg
  4. 4. Time to try some! 1) £900 into the ratio 4:5 2) £200 into the ratio 3:5 3) £630 into the ratio 7:11 4) 2205kg into the ratio 8:13 5) 450 hours into the ratio 5:6:7 6) 550 lbs into the ratio 5:8:9 £400 : £500 £75 : £125 £245 : £385 840kg : 1365kg 125h : 150h : 175h 125lbs : 200lbs : 225lbs

×