计算:(1)(-12)-5+(-14)-(-39)(2)-32÷(-3)2+3×(-2)+|-4|(3)[(-16)-(-512)+215]×(-60
计算:(1)(-12)-5+(-14)-(-39)(2)-32÷(-3)2+3×(-2)+|-4|(3)[(-16)-(-512)+215]×(-60)(4)-45×[(...
计算:(1)(-12)-5+(-14)-(-39)(2)-32÷(-3)2+3×(-2)+|-4|(3)[(-16)-(-512)+215]×(-60)(4)-45×[(-12)÷(0.75-1)+(-2)5].
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推荐于2016-09-24
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(1)(-12)-5+(-14)-(-39)
=-12-5-14+39
=-31+39
=8;
(2)-3
2÷(-3)
2+3×(-2)+|-4|
=-9÷9-6+4
=-1-6+4
=-3;
(3)[
(-)-(-)+]×(-60)
=
×60-
×60-
×60
=10-25-8
=-23;
(4)
-×[(-)÷(0.75-1)+(-2)5]=-
×[(-
)÷(-
)-32]
=-
×[2-32]
=-
×[-30]
=24.
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