问题 解答题
计算:
(1)-20-(-15)+(-12)-(+5);
(2)-14-(-2)2÷(-2)-(-3)3×(-
2
3
)2
答案

(1)-20-(-15)+(-12)-(+5)

=-20+15-12-5

=-37+25

=-12;

(2)-14-(-2)2÷(-2)-(-3)3×(-

2
3
)2

=-1-4÷(-2)-(-27)×

4
9

=-1+2+12

=13.

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