Question: Solve. See the third Concept Check in this section. 1. Use rounding to estimate the best sum for a. 2 b. 3 c. 20 d.

Solve. See the third Concept Check in this section.
1. Use rounding to estimate the best sum for
19 9- + 9-. 11- 20 10

a. 2 b. 3 c. 20 d. 21

19 9- + 9-. 11- 20 10

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