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3 years ago

5

Select the proper placement for parentheses to speed up the addition for the expression 2 + 9 + 8 + 1 A. (1 + 2) + (9 + 8) B. (8

+ 9) + (2 + 1) C. (9 + 2) + (8 + 1) D. (8 + 2) + (9 + 1)

2 answers:

sleet_krkn [62]3 years ago

8 0

It's D because
(8+2) = 10
(9+1) = 10
Hope this helped. (:

irina [24]3 years ago

3 0

The answer is D. Because it is easier to add 9 and 2 and also 8 and 1.

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