CHAPTER 4
Practice 4-1464Practice 4-21a. 3 0 b. 1 5 c. 0 82a. 7 6 b. 6 7 c. 9 13a. 3 21 b. 5 18 c. 6 944a. 7 100 b. 4 805 c. 2 45005a. 8 $1.05 b. 9 $31.59 c. 3 $82.80Use front-end digits to estimate the product.
6a. 2 148 b. 5 822 c. 9 704Find the value of the variable.
7a. 2 s 18 b. 21 7 x8a. 45 5 u b. 27 y 279.What is the product of 78 and 7?- What is 459 multiplied by 5?
- The product is 81. One factor is 9. What is
the other factor? - Which is greater: 7 1 or 0 7?
- What is the product of 472 and zero?
- Joel bought 3 boxes of peaches. There
were 6 peaches in each box. How many
peaches did he buy? - There are 8 shelves of books. Each shelf
holds 45 books. How many books are
there? - What is the product of $19.95 and one?
- Meg bought 6 CDs. Each CD cost $9.98.
How much did she spend? - A compact disc is on sale for $7.99. How
much would it cost to buy 11 of the discs? - Zenia earns $10.05 an hour. She works 9
hours a week. How much does she earn
in one week? - Each volume of an encyclopedia has 568
pages. There are 24 volumes. How many
pages are in the entire encyclopedia? - What is the product of 409 and 89?
- A pillowcase costs $4.25. How much
would cases for 15 pillows cost? - A toy store has 52 bags of marbles. There
are 35 marbles in each bag. How many
marbles does the store have? - There are 115 windows on each floor of
an office building. The building has 48
floors. How many windows does the
building have?
1a. 10 34 b. 10 58 c. 10 985
2a. 20 12 b. 40 42 c. 50 50
3a. 24 b. 57 c. 6123
18 21 6
4a. 96 17 b. 7 7931 c. 63 403
5a. 12 $1.02 b. 41 $3.40 c. 35 $6.50Use rounding to estimate. Then multiply.
6a. 32 41 b. 29 491 c. 47 307
7a. 12 $1.25 b. 22 $4.59 c. 84 $8.828.What is the product of 748 and 10?
9.A theater has 24 rows of seats. There are
18 seats in each row. How many seats
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