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astraxan [27]
3 years ago
13

11. Select the proper placement for parentheses to speed up the addition for the expression 2 + 9 + 8 + 1

Mathematics
2 answers:
Alinara [238K]3 years ago
7 0
Option A, because you quickly see that each part adds up to 10 so the total must be 20

neonofarm [45]3 years ago
6 0
The answer is c 8+9+2+1
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