Unit 7 Contents

1. For each of the problems below, do the following:
• Write a story that fits the number sentence.
• Write the division problem as a multiplication problem with a missing factor.
• Write a set of related number sentences that will help you solve the problem.
• Solve the problem and check that your answer is reasonable.
1. 4780 ÷ 9
2. 885 ÷ 80
2. Luis listed the following number sentences to help him solve 768 ÷ 11.

11 50 = 550
11 60 = 660
11 70 = 770
11 80 = 880

Write an estimate using his list.

For Questions 3–7, solve each problem using one of the following methods from the Division Strategies Menu in the Reference section.

ESTIMATION         COLUMN METHOD         RECTANGLE MODEL         MENTAL MATH

Show or tell how you solved the problem. Use each method at least once.

3. 8523 ÷ 4
4. 84,000 ÷ 12
5. 555 ÷ 7

6. Jessie and Maya spent over 117 hours playing girls lacrosse last year. They practiced with their team and competed in games about 5 hours a week. About how many months did Jessie and Maya play lacrosse?
7. Frank makes identical snack bags for himself, three brothers, and two sisters every weekend. His mother buys one crate of 38 apples, one box of 40 juice boxes, and one carton of 72 pretzel bags for him to use each week.
1. How many snack bags will each person get?
2. How much of everything is in each snack bag?
3. Is anything left over? If so, what?