题目内容
计算:
(1)(-12)-5+(-14)-(-39)
(2)-32÷(-3)2+3×(-2)+|-4|
(3)[(-
)-(-
)+
]×(-60)
(4)-
×[(-
)÷(0.75-1)+(-2)5].
(1)(-12)-5+(-14)-(-39)
(2)-32÷(-3)2+3×(-2)+|-4|
(3)[(-
| 1 |
| 6 |
| 5 |
| 12 |
| 2 |
| 15 |
(4)-
| 4 |
| 5 |
| 1 |
| 2 |
(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)[(-
)-(-
)+
]×(-60)
=
×60-
×60-
×60
=10-25-8
=-23;
(4)-
×[(-
)÷(0.75-1)+(-2)5]
=-
×[(-
)÷(-
)-32]
=-
×[2-32]
=-
×[-30]
=24.
=-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 |
| 2 |
| 15 |
=
| 1 |
| 6 |
| 5 |
| 12 |
| 2 |
| 15 |
=10-25-8
=-23;
(4)-
| 4 |
| 5 |
| 1 |
| 2 |
=-
| 4 |
| 5 |
| 1 |
| 2 |
| 1 |
| 4 |
=-
| 4 |
| 5 |
=-
| 4 |
| 5 |
=24.
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