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Name____________________________________________________________Date___________ 
2.4 Practice A 
Multiply. Write the answer in simplest form. 
1. 
2 2 1 
5 4 
´ 2. 
5 3 5 
5 7 
´ 3. 
5 1 ´ 
7 
2 11 
4. 
6 2 12 
3 
´ 5. 
4 2 17 
5 8 
´ 6. 
9 2 2 
3 
´ 
7. 
4 4 3 
9 8 
´ 8. 
35 12 
8 
´ 9. 
4 2 ´ 
3 
3 14 
10. 
31 31 
9 9 
´ 11. 
51 4 1 
5 6 
´ 12. 
2 2 ´ 
31 
15 8 
13. Describe and correct the error in finding the product. 
Evaluate the expression when a = 2 3, 
4 
b = 4 3, 
8 
and c = 32. 
7 
14. 
31 
5 
a · 15. 
6 2 
7 
· b 16. 
117 
18 
· c 17. b · c 
18. You have 20 floor tiles that are 
9 5 
8 
inches long. How long are the tiles 
when placed end to end? 
19. Five years ago, an alligator was 
2 1 
6 
feet long. Today, the alligator is three 
times longer. How long is the alligator now? 
20. The sixth grade class consumes 
51 
3 
cases of milk each day. How much will 
they consume in a five-day week? 
21. A poster is 
8 1 
2 
inches by 11 inches. You enlarge the poster by increasing 
each dimension by a factor of 
2 1 
2 
. What is the area of the new poster? 
Big Ideas Math Green Copyright © Big Ideas Learning, LLC 
62 
Resources by Chapter All rights reserved.
Name____________________________________________________________Date___________ 
2.4 Practice B 
Multiply. Write the answer in simplest form. 
1. 
13 4 
8 9 
´ 2. 
4 2 1 
15 4 
´ 3. 
5 ´ 
3 2 
17 5 
4. 
211 2 
12 5 
´ 5. 
13 20 
4 21 
´ 6. 
4 9 ´ 
11 
10 7 
7. 
28 8 2 
´ 8. 
7 
5 5 2 2 
12 5 
´ 9. 
81 ´ 
4 1 
3 2 
10. Describe and correct the error in finding the product. 
Evaluate the expression when x = 22, 
9 
y = 33, 
5 
and z = 62. 
3 
11. 
14 
5 
· x 12. 
1 8 
27 
· y 13. xy 14. 
8 4 
9 
yz + 
Multiply. Write the answer in simplest form. 
15. 
3 6 3 2 2 
5 4 9 
´ ´ 16. 
17 12 3 2 
8 3 
´ ´ 17. 
4 1 ´ 2 2 ´ 
7 1 
6 7 5 
18. You have a ribbon that is 
6 7 
8 
inches long. You use 
2 
5 
of it on a project. 
How much of the ribbon is left? 
19. Find the area of the shaded region. Explain how you found the area. 
Big Ideas Math Green Copyright © Big Ideas Learning, LLC 
Resources by Chapter All rights reserved. 
63

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2.4

  • 1. Name____________________________________________________________Date___________ 2.4 Practice A Multiply. Write the answer in simplest form. 1. 2 2 1 5 4 ´ 2. 5 3 5 5 7 ´ 3. 5 1 ´ 7 2 11 4. 6 2 12 3 ´ 5. 4 2 17 5 8 ´ 6. 9 2 2 3 ´ 7. 4 4 3 9 8 ´ 8. 35 12 8 ´ 9. 4 2 ´ 3 3 14 10. 31 31 9 9 ´ 11. 51 4 1 5 6 ´ 12. 2 2 ´ 31 15 8 13. Describe and correct the error in finding the product. Evaluate the expression when a = 2 3, 4 b = 4 3, 8 and c = 32. 7 14. 31 5 a · 15. 6 2 7 · b 16. 117 18 · c 17. b · c 18. You have 20 floor tiles that are 9 5 8 inches long. How long are the tiles when placed end to end? 19. Five years ago, an alligator was 2 1 6 feet long. Today, the alligator is three times longer. How long is the alligator now? 20. The sixth grade class consumes 51 3 cases of milk each day. How much will they consume in a five-day week? 21. A poster is 8 1 2 inches by 11 inches. You enlarge the poster by increasing each dimension by a factor of 2 1 2 . What is the area of the new poster? Big Ideas Math Green Copyright © Big Ideas Learning, LLC 62 Resources by Chapter All rights reserved.
  • 2. Name____________________________________________________________Date___________ 2.4 Practice B Multiply. Write the answer in simplest form. 1. 13 4 8 9 ´ 2. 4 2 1 15 4 ´ 3. 5 ´ 3 2 17 5 4. 211 2 12 5 ´ 5. 13 20 4 21 ´ 6. 4 9 ´ 11 10 7 7. 28 8 2 ´ 8. 7 5 5 2 2 12 5 ´ 9. 81 ´ 4 1 3 2 10. Describe and correct the error in finding the product. Evaluate the expression when x = 22, 9 y = 33, 5 and z = 62. 3 11. 14 5 · x 12. 1 8 27 · y 13. xy 14. 8 4 9 yz + Multiply. Write the answer in simplest form. 15. 3 6 3 2 2 5 4 9 ´ ´ 16. 17 12 3 2 8 3 ´ ´ 17. 4 1 ´ 2 2 ´ 7 1 6 7 5 18. You have a ribbon that is 6 7 8 inches long. You use 2 5 of it on a project. How much of the ribbon is left? 19. Find the area of the shaded region. Explain how you found the area. Big Ideas Math Green Copyright © Big Ideas Learning, LLC Resources by Chapter All rights reserved. 63