Question

Bỏ dấu ngoặc rồi tính:

1)(15+37)+(52-17-37)

2)(21-32)-(-12+32)

Answer 1

\(\text{1.(15+37)+(52-17-37)}\\ =15+37+52-17-37\\ =\left(15+52-17\right)+\left(37-37\right)\\ =50+0=50\)

\(\text{2.(21-32)-(-12+32)}\\ =21-32+12-32\\ =\left(21+12\right)+\left(-32-32\right)\\ =33+-64=-31\)

Answer 2

\(1,=15+37+52-17-37=50\)

\(2,=21-32+12-32=-40\)