Today we introduced ratios. Ratios are a way of showing how one amount compares to another. e.g if red paint: white paint is 1:8 that means we have 1 bucket of red paint for 8 buckets of white paint, or 1 cup of red paint for 8 cups of white paint. This is not the same as 8:1. 1:8 would make a very light pink (lots of white), 8:1 would make a very dark pink (lots of red).
Ratios can be simplified just like fractions. e.g 4:10 becomes 2:5 by dividing both parts by 2.
Ratios should be in the same units. e.g 3m:70cm = 300cm:70cm = 30:7 after dividing by 10.
Homework: 5.01
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