Which one of the following uses estimation to check 267-154=113? a. 300-200=100. b. 113+154=267. c. 300-150=150. d. 270-150=120

Question

Zachary Young

Mathematics

1 November, 02:41

Which one of the following uses estimation to check 267-154=113? a. 300-200=100. b. 113+154=267. c. 300-150=150. d. 270-150=120

+1

Answers (2)

Know the Answer?

Isabella Callahan · Answer 1

A. 300-200=100

You round 267 to 300, 154 to 200, and 113 to 100.

Isai Lindsey · Answer 2

A, C and D are all using estimation to check the result.

A is rounding to the nearest multiple of 100.

267 - - > 300

154 - - > 200

C is rounding to the nearest multiple of 50.

267 - - > 300

154 - - > 150

D is rounding to the nearest multiple of 10.

267 - - > 270

154 - - > 150

Those each give you an estimation of the final answer to see if 113 is a reasonable answer.

Method B is just switching the values around to check the subtraction using addition. That's a valid way to double check the result, but is NOTestimation.

If you are only expected to give * one * answer, then method D is the best way to check using estimation because it does the least amount of rounding.

Answer:

D. 270 - 150 = 120