Grade 4 - Progress in Mathematics

471

CHAPTER 12

Practice 12-1

1a. 8 
 1 8 b. 80 
 10 7 c. 800 
 10 40

2a. 420 
 706 b. 500 
 5010 c. 210 
 30 7

3a. 20 
 4  0  0  0  b. 80 
 6  4  0  c. 90 
 5  4 ,0 0  0 

Estimate the quotient. Use compatible numbers.

4a. 56 
 115 b. 249 
 328 c. 109 
 482

5a. 62 
 1  4  2  2 b. 74 
 6  5  7  9 c. 52 
$ 4 .8 0 $.10

Divide and check.

6a. 21 
 8  8 4 R4b. 31 
 9  4 3 R1 c. 33 
$.9 9 $.03

7a. 35 
 7  3 2 R3b. 72 
 3  6  0  5 c. 91 
$ 5 .4 6 $.06

8. How many dozens are there in 48?


9. A factory can make 21 toy trains in one
   hour. How long will it take to make 147
   trains?
   10. Roger worked 30 hours a week at
   summer camp. He worked a total of 240
   hours. How many weeks did he work?
   11. A box can hold 52 cans. How many boxes
   are needed to hold 260 cans?
   12. There are 682 baseball cards and 31
   children. If each child takes the same
   number of cards, what is the greatest
   number each child will get?
   13. Avi buys 11 marbles for $.99. How much
   does each marble cost?
   14. The dividend is 549. The divisor is 61.
   What is the quotient?
   15. Amy earns $44 in 11 hours. How much
   does she earn in 1 hour?
   16. A ship travels 29 miles an hour. How long
   will it take the ship to travel 87 miles?

Practice 12-2

1a. 28 
 1  0  0  b. 12 
 9  0 ,0 0  0  c. 14 
 2  3  4 

2a. 79 
 2  2  9  b. 98 
 8  7  7  c. 38 
 2  7  9 

3a. 65 
 5  4  1  b. 72 
 6  3  0  c. 63 
 3  7  1 

4a. 86 
$ 2  0 .6 4 b. 92 
 5  0  6  0  c. 54 
 2  9  2  0 

5a. 62 
 3  0  0  0  b. 47 
$ 9 .4 0  c. 24 
 2  3 ,6 0  0 

6a. 8 
 8  3  2  b. 16 
$ 3  2 .1 6  c. 25 
$ 5  0 .7 5 

7. A carton can hold 24 cans of soup. A
   diner uses 627 cans in a month. How
   many full cartons does the diner use?


8. The diner has 576 drinking glasses stored
   on shelves. Each shelf holds 48 glasses.
   At most, how many shelves are there?


9. Rita buys 25 postcards for $8.75. How
   much does each postcard cost?
   10. A paper company donates 774 packs of
   paper to 18 schools. If the packs are
   shared equally, how many does each
   school receive? How many are left over?
   11. The dividend is 46,460. The divisor is 23.
   What is the quotient?
   12. A train travels 68 miles per hour. How
   long will it take the train to travel 748
   miles?
   13. Trudy buys a newspaper every day for 14
   days. She spends $4.90. How much does
   each newspaper cost?
   14. Glen’s dog eats 14 oz of dry food every
   day. Will a 400-oz bag of dog food last
   four weeks?
   15. Ruth buys 18 yards of ribbon for $18.90.
   How much does one yard of ribbon cost?
   16. What is the remainder when 824,402 is
   divided by 42?

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