问题
解答题
计算: (1)(-12)-5+(-14)-(-39) (2)-32÷(-3)2+3×(-2)+|-4| (3)[(-
(4)-
|
答案
(1)(-12)-5+(-14)-(-39)
=-12-5-14+39
=-31+39
=8;
(2)-32÷(-3)2+3×(-2)+|-4|
=-9÷9-6+4
=-1-6+4
=-3;
(3)[(-
)-(-1 6
)+5 12
]×(-60)2 15
=
×60-1 6
×60-5 12
×602 15
=10-25-8
=-23;
(4)-
×[(-4 5
)÷(0.75-1)+(-2)5]1 2
=-
×[(-4 5
)÷(-1 2
)-32]1 4
=-
×[2-32]4 5
=-
×[-30]4 5
=24.