California
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.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 |
| 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 |
| 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 |
| 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 |
| 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 |
| 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 |
| cookies left | |||||||||
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 |
