To find one-fifth of a number, divide the number

13. At 5 cents each how many pencils can I buy for

15 cents?

14. How many bottles of milk can I get for 30 cents, if each bottle costs 5 cents?

15. Tom bought 5 agates for 40 cents. What was the price of each agate?

Division by 10

(a) How many 10's are there in 20? 20 contains how many 10's? 20 ÷ 10

=

(c) How many dimes does it take to make 20 cents?

(d) On the board write a division table for 10, from 10 ÷ 10 = 1, to 100 10 = 10.

ORAL OR WRITTEN WORK

1. If one grapefruit costs 10 cents, how many grapefruit can I buy for 20 cents? For 50 cents?

2. At 10 cents each, how many toys can Robert buy for 30 cents? For 60 cents? For 80 cents?

3. How many dimes does it take to make 70 cents? 90 cents? One dollar (100 cents)?

4. Ray has 40 cents to spend for Christmas presents. If he spends his 40 cents for 5-cent handkerchiefs, how many handkerchiefs can he buy? If he buys 10-cent handkerchiefs, how many can he buy with his 40 cents? Find the quotients:

(c) Divide 8 pieces of chalk into groups of 4 pieces each. How many groups are there? 4 is contained in 8 how many times?

(d) 8 ÷ 4

=

12 ÷ 4 =

16 ÷ 4 = Group pieces of chalk to show your answers are right. (e) On the board, write a division table for 4, from 4 ÷ 4 1 to 40 ÷ 4 = 10.

=

(ƒ) of 20 = 5

To find one-fourth of a number, divide the number by 4.

(g) At 4 cents each, how many apples can be bought for 8 cents? There will be as many apples as there are 4's in 8, or 2 apples.

17. If one orange costs 4 cents, how many oranges can I buy for 12 cents? For 16 cents?

18. The 32 children in our room marched 4 in a row. How many rows were there?

19. It takes 4 shoes to shoe one horse. How many horses can be shod with 20 shoes?

If apples

36. Sarah had 20 cents to spend for fruit. cost 2 cents each, how many apples could she buy? If bananas cost 4 cents each, how many bananas could she buy for 20 cents? If oranges cost 5 cents each, how many could she buy for 20 cents?

.

37. Jane picked 24 roses. She put them into 4 vases, with the same number of roses in each vase. How many roses did she put into each vase?

Division Problems1

(a) At 2 cents each, how many pencils can you buy for 10 cents?

You can buy as many pencils as 2 cents is contained times in 10 cents, that is, 5 pencils.

(b) If two boys divide 20 cents equally, how many cents will one boy receive?

One boy will receive of 20 cents, or 10 cents.

1. I have 20 cents. How many pencils costing 5 cents each can I buy? If I buy 4-cent pencils, how many can I buy for 20 cents?

1 TO THE TEACHER: Distinguish between the measurement type of division problem, as exemplified in (a), and the partitive type, as in (b).

2. Walter picked 15 quarts of berries one Saturday. He received one-fifth of them for picking them. How many quarts did he receive?

3. Nan earned 35 cents for picking berries. The price paid for picking one quart was 5 cents. How many quarts did she pick?

4. Dick had 40 papers to sell. He sold of them in an hour. How many papers did he sell in an hour?

5. Four boys buy a ball for 80¢. What part of the cost should each boy pay? How many cents should each boy pay?

6. Mother made 20 biscuits for lunch for five people. How many biscuits could each person have?

7. If 4 boys pay equally for a ball which costs 16 cents, each boy's share of the cost is

cents.

8. Mother divides 12 pieces of candy among 4 children. How many pieces does she give to each child?

9. There are 20 children on the playground. If they "count off" into 2 equal groups, how many children are in each group? If they "count off" into 4 equal groups, how many children are in each group?

10. There are 45 desks in our schoolroom, divided in 5 equal rows. How many seats are in each row?

11. Jane has 4 dolls at her doll party. She has 20 cakes to divide among the dolls. How many cakes should each doll get?

12. Mother made 40 cookies for a picnic. If 5 people go on the picnic, how many cookies can each one have?