
计算:(1)-8-1(2)(?27)×(?13)×2×(?5)(3)12?(?6)÷23+3×(?5)(4)322×[(?23)2?2]
计算:(1)-8-1(2)(?27)×(?13)×2×(?5)(3)12?(?6)÷23+3×(?5)(4)322×[(?23)2?2]....
计算:(1)-8-1(2)(?27)×(?13)×2×(?5)(3)12?(?6)÷23+3×(?5)(4)322×[(?23)2?2].
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(1)-8-1=-(8+1)=-9;
(2)(?27)×(?
)×2×(?5),
=-27×
×2×5,
=-90;
(3)12?(?6)÷
+3×(?5),
=12-(-9)+(-15),
=6;
(4)
×[(?
)2?2],
=
×(
-2),
=2-9,
=-7.
(2)(?27)×(?
1 |
3 |
=-27×
1 |
3 |
=-90;
(3)12?(?6)÷
2 |
3 |
=12-(-9)+(-15),
=6;
(4)
32 |
2 |
2 |
3 |
=
9 |
2 |
4 |
9 |
=2-9,
=-7.
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