Copyright © 2015 Pearson Education, Inc. 13

ANSWERS FOR EXERCISES

MATH GRADE 7 UNIT 7

PUTTING MATH TO WORK

Copyright © 2015 Pearson Education, Inc. 14

Grade 7 Unit 7: Putting Math to Work

ANSWERS

ANSWERS

1. Here is a possible arrangement (the arrow indicates the front view).

7 cubes

2. These are some possible arrangements (the arrow indicates the front view).

8 cubes 9 cubes

10 cubes 11 cubes

12 cubes 13 cubes

LESSON 1: BUILDING BLOCKS

Copyright © 2015 Pearson Education, Inc. 15

Grade 7 Unit 7: Putting Math to Work

ANSWERSLESSON 1: BUILDING BLOCKS

14 cubes 15 cubes

16 cubes 17 cubes

18 cubes 19 cubes

20 cubes

Challenge Problem

3. No, there are no impossible arrangements. You can always add or remove a cube that hides behind one of the cubes that can be seen in the front view or side view.

Copyright © 2015 Pearson Education, Inc. 16

Grade 7 Unit 7: Putting Math to Work

ANSWERS

ANSWERS

1. Answers will vary. Ask a classmate to discuss your research.

2. Answers will vary. Ask a classmate to comment on your work.

Challenge Problem

3. Answers will vary. Ask a classmate to comment on your work.

LESSON 3: SECRETS OF FLYING

Copyright © 2015 Pearson Education, Inc. 17

Grade 7 Unit 7: Putting Math to Work

ANSWERS

ANSWERS

1. Answers will vary. Ask a classmate to discuss your research.

2. Answers will vary. Ask a classmate to comment on your work.

Challenge Problem

3. Answers will vary. Ask a classmate to comment on your work.

LESSON 4: FLYING AND SWIMMING

Copyright © 2015 Pearson Education, Inc. 18

Grade 7 Unit 7: Putting Math to Work

ANSWERS

ANSWERS

1. Answers will vary. Ask a classmate to comment on your comparison.

Challenge Problem

2. Answers will vary. Ask your partner to comment on your problem.

LESSON 5: THE GREAT LAKES

Copyright © 2015 Pearson Education, Inc. 19

Grade 7 Unit 7: Putting Math to Work

ANSWERS

ANSWERS

1. Answers will vary. Ask a classmate to comment on your comparison.

2. Answers will vary. Ask a classmate to comment on your diagram.

Challenge Problem

3. Answers will vary. Ask a classmate to comment on your work.

LESSON 6: THE WELLAND CANAL

Copyright © 2015 Pearson Education, Inc. 20

Grade 7 Unit 7: Putting Math to Work

ANSWERS

ANSWERS

1. About 1,100 ships per month travel through the Soo Locks when the locks are open.

Challenge Problem

2. Answers will vary. Ask your partner to comment on your problem.

LESSON 7: REVISE YOUR WORK