The purpose of this activity is to support students in understanding the meaning of part-whole fractions in simple ratios.
Show students this ratio made with cubes. You might use the "blapple" juice context (mixture of blueberry and apple juice) or another context that is more relevant to your students.
How can we record this mixture as a ratio of blue to yellow? (2:4 or 1:2)
What fraction of the mixture is blue? (2/6 or 1/3)
What fraction of the mixture is yellow? (4/6 or 1/3)
Note that renaming 2/6 as 1/3 and 4/6 as 2/3 involves unitising the parts in different ways, as shown in the image below.
Next steps
Printed from https://nzmaths.co.nz/resource/identifying-fractions-simple-ratios at 7:26pm on the 29th April 2024