
计算:(1)40÷(-8)+(-3)×(-2)2+17(2)?9?[?5?(1?103×35)÷(?3)2]
计算:(1)40÷(-8)+(-3)×(-2)2+17(2)?9?[?5?(1?103×35)÷(?3)2]....
计算:(1)40÷(-8)+(-3)×(-2)2+17(2)?9?[?5?(1?103×35)÷(?3)2].
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(1)40÷(-8)+(-3)×(-2)2+17
=-5+(-3)×4+17
=-5+(-12)+17
=-17+17
=0;
(2)?9?[?5?(1?
×
)÷(?3)2]
=-9-[-5-(1-2)÷9]
=-9-[-5-(-1)×
]
=-9-(-5+
)
=-9+5-
=-4-
=-4
.
=-5+(-3)×4+17
=-5+(-12)+17
=-17+17
=0;
(2)?9?[?5?(1?
10 |
3 |
3 |
5 |
=-9-[-5-(1-2)÷9]
=-9-[-5-(-1)×
1 |
9 |
=-9-(-5+
1 |
9 |
=-9+5-
1 |
9 |
=-4-
1 |
9 |
=-4
1 |
9 |
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