
计算:(1)(-12)-5+(-14)-(-39)(2)2-2÷13×3(3)(512+23?34)×(?12)(4)?14?(1?0.5)×13×[2
计算:(1)(-12)-5+(-14)-(-39)(2)2-2÷13×3(3)(512+23?34)×(?12)(4)?14?(1?0.5)×13×[2?(?3)2]....
计算:(1)(-12)-5+(-14)-(-39)(2)2-2÷13×3(3)(512+23?34)×(?12)(4)?14?(1?0.5)×13×[2?(?3)2].
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(1)(-12)-5+(-14)-(-39)
=-12-5-14+39
=8;
(2)2-2÷
×3
=2-6×3
=2-18
=-16;
(3)(
+
?
)×(?12)
=-5-8+9
=-4;
(4)?14?(1?0.5)×
×[2?(?3)2]
=-1-
×
×[2-9]
=-1-
×
×[-7]
=-1+
=
.
=-12-5-14+39
=8;
(2)2-2÷
1 |
3 |
=2-6×3
=2-18
=-16;
(3)(
5 |
12 |
2 |
3 |
3 |
4 |
=-5-8+9
=-4;
(4)?14?(1?0.5)×
1 |
3 |
=-1-
1 |
2 |
1 |
3 |
=-1-
1 |
2 |
1 |
3 |
=-1+
7 |
6 |
=
1 |
6 |
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