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Chapter 6   

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Bake Sale

solution

They had 5 cookies left.

explanation

One Way to Solve
Tammy sold 32 cookies.
Nick sold 5 more than Tammy.
    32 + 5 = 37
Cara sold 10 fewer than Tammy.
    32 – 10 = 22

Add the number of cookies each person sold to find out how many they sold altogether.
32 the number of cookies Tammy sold
37 the number of cookies Nick sold
+ 22 the number of cookies Cara sold
91 the total number of cookies sold

Subtract.
96 the number of cookies they had to sell
– 91 the number of cookies they sold
5 the number of cookies they had left

If you use the hundred chart, assign each person a different color.
Tammy — red
Nick — green
Cara — yellow
See the chart below.

a number chart

Another Way to Solve
Subtract or use the hundred chart to help you.
96 the number they had to sell
– 32 the number of cookies Tammy sold
64 the number of cookies left after Tammy sold her cookies

Nick sold 5 more than Tammy.
     32 + 5 = 37
64 the number of cookies left after Tammy sold her cookies
– 37 the number of cookies that Nick sold
27 the number of cookies left after Nick sold his cookies

Cara sold 10 fewer than Tammy.
     32 – 10 = 22
27 the number of cookies left after Nick sold his cookies
– 22 the number of cookies that Cara sold
5 the number of cookies left at the end of the bake sale

 


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