Download Practice B 1-12

Name
LESSON
Date
Class
Practice B
1-12 Multiplication and Division Equations
Solve each equation. Check your answer.
r
x
1. 68 4
2. k 24 85
3. 255 4
4. 42 w 18
a
22
5. 15
6. 82 b 5
c
7. 7 9
8. 28 z 3
y
10
9. 12
Solve each equation. Check your answer.
10. 52w 364
11. 41x 492
12. 410 82p
13. 35d 735
14. 195 65h
15. 4k 140
16. 110 5e
17. 27a 216
18. 96 12n
19. Ashley earns $5.50 per hour babysitting. She wants to buy a CD
player that costs $71.50, including tax. How many hours will she
need to work to earn the money for the CD player?
20. A cat can jump the height of up to 5 times the length of its tail.
How high can a cat jump if its tail is 13 inches long?
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Holt Mathematics
Practice B
LESSON
1-12 Multiplication and Division Equations
Practice A
LESSON
1-12 Multiplication and Division Equations
Solve each equation. Check your answer.
Solve.
1. 16 n 2
e
8
2. 10
n 32
d
4. 18 3
e 80
1. 68 4
a 84
w 756
b 120
8. 75 3x
w7
10. 77 11m
x 25
h 12
x 15
10. 52w 364
e 22
1,600 words
a8
n8
20. A cat can jump the height of up to 5 times the length of its tail.
How high can a cat jump if its tail is 13 inches long?
h
13;
h 65 inches
5
15 gallons of gasoline
91
Copyright © by Holt, Rinehart and Winston.
All rights reserved.
Holt Mathematics
Solve each equation. Check your answer.
m 234
5. 308 44b
g 55
a 168
a
Solve and check: 3 4.
6. 27e 405
b7
e 15
a
4
3
a
(3) 3 4(3)
3a
1a a
3
8. The quotient of a number f and 21 is 14.
145w 725; w 5
Check:
f 21 14; f 294
Replace the variable
with the solution.
23b 253; b 11
9. A number b times 23 equals 253.
k 15 47; k 705
10. A number k divided by 15 equals 47.
12. Ten divided into a number m equals 54.
a
4
3
12
4
3
A true sentence means
the solution is correct.
44 Solve and check.
x
1. 6 3
12n 84; n 7
11. A number n multiplied by 12 is 84.
Multiply to solve a
division equation.
a 12
Translate each sentence into an equation. Then solve the equation.
7. The product of a number w and 145 is 725.
Holt Mathematics
When you solve an equation, you must get the variable by itself.
Remember, what you do to one side of an equation, you must do to
the other side.
• To solve a division equation, multiply both sides of the equation by
the same number.
a
3. 1
14
2
m
2. 9 26
92
Copyright © by Holt, Rinehart and Winston.
All rights reserved.
Reteach
LESSON
1-12 Multiplication and Division Equations
Practice C
LESSON
1-12 Multiplication and Division Equations
n 9,180
18. 96 12n
13 hours
18. At the local gas station, regular unleaded gasoline is priced at
$1.10 per gallon. If it cost $16.50 to fill a car’s gas tank, how
many gallons of gasoline did the tank hold?
4. 3g 165
k 35
17. 27a 216
19. Ashley earns $5.50 per hour babysitting. She wants to buy a CD
player that costs $71.50, including tax. How many hours will she
need to work to earn the money for the CD player?
17. Jenny can type at a speed of 80 words per minute. It took her
20 minutes to type a report. How many words was the report?
n
15. 4k 140
h3
16. 110 5e
8 oranges
p5
14. 195 65h
d 21
z7
12. 410 82p
x 12
13. 35d 735
16. The Fruit Stand charges $0.50 each for navel oranges. Kareem
paid $4.00 for a large bag of navel oranges. How many did
he buy?
1. 765 12
y 120
11. 41x 492
w7
y6
15. 6z 42
s9
z 84
Solve each equation. Check your answer.
12. 9y 54
14. 45 5s
b 410
y
10
9. 12
8. 28 z 3
c 63
p5
11. 4h 48
m7
13. 2x 30
9. 60 12p
x 1,020
6. 82 b 5
a 330
c
7. 7 9
Solve and check.
7. 7w 49
k 2,040
a
5. 1
22
5
4. 42 w 18
6. 30 b 4
x
3. 255 4
2. k 24 85
r 272
x 150
5. a 12 7
d 54
r
x
3. 25 6
m 10 54; m 540
s
2. 8 8
x 18
13. About three tons of ore must be mined and processed to
produce a single ounce of gold. How many tons of ore are
required to produce a pound of gold?
c
3. 1
7
0
s 64
n
4. 3 12
c 70
n 36
• To solve a multiplication equation, divide both sides of the equation by
the same number.
Solve and check: 5k 30.
48 tons of ore
5k
1k k
5
14. It costs about $2,931 per hour to operate a Boeing 757 airplane.
Find the cost to operate a Boeing 757 during a 5-hour flight.
5k 30
Divide to solve a
multiplication equation.
5k
30
5
5
k6
$14,655
Check: 5k 30
15. Each person in the United States eats an average of 23 quarts
of ice cream per year. At this rate, the seventh-grade class will
eat about 1,794 quarts of ice cream this year. How many
students are in the seventh-grade class?
5(6) 30
Replace the variable
with the solution.
78 students
True
30 30 Solve and check.
5. 2w 16
16. Jumbo shrimp sell for $14.99 per pound in a local supermarket.
One customer spent $74.95 on shrimp for a dinner party. How
much shrimp did this customer purchase for the party?
w8
6. 4b 24
7. 9z 45
b6
z5
8. 10m 40
m4
5 pounds
Copyright © by Holt, Rinehart and Winston.
All rights reserved.
93
Copyright © by Holt, Rinehart and Winston.
Holt Mathematics
Copyright © by Holt, Rinehart and Winston.
All rights reserved.
121
94
Holt Mathematics
Holt Mathematics