Unit 7 Contents

Solve these division problems mentally. Check your answers using a calculator.

1. 8 ÷ 2
   80 ÷ 2
   800 ÷ 2
   8000 ÷ 2
2. 20 ÷ 1
   200 ÷ 10
   2000 ÷ 10
   20,000 ÷ 100
3. 27 ÷ 9
   270 ÷ 9
   2700 ÷ 9
   27,000 ÷ 9
4. 48 ÷ 6
   480 ÷ 6
   4800 ÷ 6
   48,000 ÷ 6
1. 5 ÷ 50
   50 ÷ 50
   500 ÷ 50
   5000 ÷ 50
   50,000 ÷ 50
2. 28 ÷ 7
   280 ÷ 70
   2800 ÷ 70
   28,000 ÷70
   280,000 ÷ 700
3. 42 ÷ 6
   420 ÷ 60
   4200 ÷ 60
   42,000 ÷ 60
   420,000 ÷ 6000
4. 30 ÷ 5
   300 ÷ 50
   3000 ÷ 50
   30,000 ÷ 50
   300,000 ÷ 5000
3. Show or tell how you solved the problems in Question 2B. If you used a rule, describe how the rule works.

Write a division number sentence for each question. Then estimate answers to the problems. Show or tell how you made the estimates.

4. Each camper takes a turn making meals. Nicholas is preparing camp kabobs. He cut up cherry tomatoes, onions, peppers, mushrooms, squash, zucchini, and eggplant. He has about 420 vegetable pieces. If he puts seven veggie pieces on each kabob, how many kabobs can he make?
5. Sara collected 200 small rocks. She arranged them in 9 rows. Each row is a different color. About how many rocks are in each row?
6. The Wilderness Club raised $6400 for three camp activities: boating, horseback riding, and archery. If about the same amount is spent on each activity, how much money can be spent on each?
7. Jessie just signed up to go horseback riding. She estimates that 80 campers are already on the list. 15 campers can go on each trail ride. There are 5 trail rides a day.
1. About how many trail rides will there be before Jessie gets her turn?
2. Do you think Jessie will go horseback riding today or tomorrow?