计算:(1)(-13)×(-6);(2)(+123)×(-115);(3)(-3)÷12×2;(4)(-323)÷(-512);(5)(-12+13-14-15)×(-20);(6)(-8642431)÷(-72);(7)(13-521+314-27)÷(-142);(8)(-130)÷(-23-110-数学
题文
计算: (1)(-13)×(-6); (2)(+1
(3)(-3)÷
(4)(-3
(5)(-
(6)(-864
(7)(
(8)(-
(9)-120×(-3
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答案
(1)原式=78; (2)原式=
(3)原式=-3×2×2=-12; (4)原式=
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