158

REVIEW AND DRILL

1. In a parade there were 8 men in each rank. How many men were in 9 ranks? In 7 ranks? In 10 ranks?

2. In a boys' school there were 8 boys in each row. How many boys were in 3 rows? In 5 rows? In 6 rows?

3. How many quarts in 4 pecks? In 7 pecks? In 10 pecks? In 6 pecks? In 2 pecks? In 8 pecks?

4. How many quarts are in 27 pecks? How many quarts are in 41 pecks? In 84 pecks? In 4 pecks?

5. If oranges are worth $8 a box, what will 36 boxes cost? 6. If rugs cost $85 each, what will 8 rugs cost?

7. When potatoes are worth $1.80 a bushel, what will 8 bushels be worth?

8. In a large schoolroom there are 96 seats, with 8 seats in each row. How many rows of seats are in the room?

9. There is an average of 89 good oranges in each box. How many good oranges are in 8 boxes?

10. Eight boys visit Mr. Appelby, who owns an orchard. Mr. Appelby says that they may all pick apples for one minute if they will then divide their apples evenly and give him the remainder. The boys pick 14, 16, 10, 14, 21, 12, 16, and 17 apples. How many apples does each get?

What is the answer of each of the following?

420 60

SHORT DIVISION DRILL

159

Use the device below for rapid drill in division. Divide the numbers in each of the outer two circles by the number at the center.

This is easy.

500 50

630 140

1. How many 5's in 10, 30, 5, 25, 40, 35, 50, 45, 20, 15? 2. How many 2's in 4, 8, 12, 10, 6, 16, 20, 14, 2, 18, 22? 3. How many 4's in 12, 16, 8, 4, 20, 28, 36, 24, 32, 44? 4. How many 6's in 6, 24, 12, 30, 18, 36, 48, 60, 42, 30? 5. How many 3's in 12, 6, 15, 9, 18, 24, 21, 30, 3, 27, 36? 6. How many 7's in 14, 28, 49, 70, 21, 35, 56, 28, 63? 7. How many 8's in 24, 40, 16, 32, 56, 72, 48, 64?

8. Divide each of the following numbers by 2, by 4, and

160

MULTIPLICATION BY NINE

Count by 9's to 108.

9 18 27 36 45 54 63 72 81 90 99 108

Read the following chart in this way: One 9 is 9, two 9's are 18, three 9's are 27, and so on.

Write columns like the above containing seven 9's, eight 9's, nine 9's, ten 9's, eleven 9's, and twelve 9's.

1. There are 9 windows in each of 6 rooms. How many windows are in all the rooms?

2. In a building there are 5 floors. There are 9 rooms on each floor. How many rooms are in the building?

3. A man walks 9 miles each day. How many miles does he walk in 7 days? In 4 days? In 4 days? In 12 days?

How many times is each number used in the above addi

1. If a barrel of apples costs $9, how much will 2 barrels cost? 4 barrels? 6 barrels? 8 barrels? 10 barrels?

2. A man worked 9 days at $6 a day. receive?

How much did he

3. I eat 9 ounces of meat in 1 day. At the same rate, how many ounces of meat will I eat in 4 days?

4. At 8 cents a pound, what is the cost of 9 pounds of sweet potatoes?

5. If a truck travels 9 miles on 1 gallon of gasoline, how many miles will it travel on 7 gallons of gasoline?

6. When oranges cost 6¢ each, what will 9 oranges cost? 7. If salt costs 5¢ a pound, how much will 9 pounds cost? 8. I earn $4 in 1 day. How much do I earn in 9 days? 9. If plastering costs 27¢ a square yard, what is the cost of 3 square yards?

10. I read 9 pages of a book each day. How many pages will I read in 7 days at the same rate? In 9 days?

11. When rice costs 9¢ a pound, what will 6 pounds cost? 8 pounds? 10 pounds? 12 pounds? 7 pounds?

12. When oranges cost 4¢ each, what will 9 oranges cost? 13. When soda costs 9¢ a package, how much will 4 packages cost? 6 packages? 9 packages? 7 packages?