(b) Sketch a bar model to represent the problem and then solve it. 10 + 10 = 1? Explore other pairs of fractions that total 1 whole. What addition facts can you use each time to help you? Unit 13 – Working with fractions What connection has Letisha made? What addition fact do you think she will use to find 4 __
Fractions of quantities
We can use what we know about equal sharing to help find fractions of quantities. Look at this problem. Riana and Winston have 20 toys. Riana plays with 1 _ 4 of the toys. Winston plays with 1 _ 5 of the toys. How many toys do they each play with? Let’s use an array to represent the problem.
1 _ 4 of 20 toys is 5 because 20 ÷ 4 = 5 Riana plays with 5 toys.
1 _ 5 of 20 toys is 5 because 20 ÷ 5 = 4 Winston plays with 4 toys.
Letisha plays with 2 _
5 of the 20 toys. How can you use the array to help
you find out how many toys this is?
What fraction of 12 is represented here?
1
of 12 =
171
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