Selected Answers - Big Ideas Learning

Selected Answers

Section 1.1

Whole Number Operations

(pages 7? 9)

1. addition

3. division

5. addition

7. a. dividend b. quotient c. divisor

9. 4785 - 3391; 1394 people

11. 4785 ? 2; 9570 people

13. 7081

15. 2462

17. 433

19. 6944

21. 31

23. 60

25. 47 -- 110 173

27. The partial product 39 should be moved to the left so that the 3 is under the 2 and the 9 is under the 7. The answer should be 663.

29. multiplication 35. 24 in.; 35 in.2

31. division 37. 36 m; 80 m2

33. addition

39. You can use addition to check your answer by adding 93 to itself 6 times. You can use division to check your answer by dividing 558 by either 93 or 6.

41. no; If the remainder is greater than the divisor, then the quotient should be increased until the remainder is less than the divisor or equal to zero.

43. 46 tokens

45. a. $424

b. --3 qt, or --3 gal

4

16

47 and 49. y 7

6

5

4

3 (1, 3) 2

1

(6, 0)

1 2 3 4 5 6 7x

51. A

Section 1.2

Powers and Exponents

(pages 14 and 15)

1. An exponent indicates the number of times the base is used as a factor. A power is the entire expression (base and exponent). A power is a product of repeated factors.

3. 3 + 3 + 3 + 3 = 3(4) does not belong because it shows a product as a sum of repeated addends, whereas the other three show powers as products of repeated factors.

5. 132

7. 25

9. 84

11. 76

13. The base is written as the exponent and the exponent is written as the base.

4 4 4 = 43

15. 64

17. 196

19. 65,536

21. 1,419,857

23. 8,000,000 people

25. not a perfect square

27. perfect square

29. perfect square

31. not a perfect square

A10 Selected Answers

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