
计算:(1)(-16+34-512)×(-12);(2)?110?[?3×(?23)2?223÷(?2)3]
计算:(1)(-16+34-512)×(-12);(2)?110?[?3×(?23)2?223÷(?2)3]....
计算:(1)(-16+34-512)×(-12);(2)?110?[?3×(?23)2?223÷(?2)3].
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(1)(-
+
-
)×(-12),
=(-
)×(-12)+
×(-12)+(-
)×(-12),
=2+(-9)+5,
=-2.
(2)原式=-1-[-3×
-
÷(-8)],
=-1-[-
-
×(-
)],
=-1-[-
+
],
=-1-(-1),
=0.
1 |
6 |
3 |
4 |
5 |
12 |
=(-
1 |
6 |
3 |
4 |
5 |
12 |
=2+(-9)+5,
=-2.
(2)原式=-1-[-3×
4 |
9 |
8 |
3 |
=-1-[-
4 |
3 |
8 |
3 |
1 |
8 |
=-1-[-
4 |
3 |
1 |
3 |
=-1-(-1),
=0.
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