题目内容
计算:(1)-5-3.5÷
×(-
)
(2)-14-[1-(1-0.5×
)]×[2-(-3)2].
| 7 |
| 8 |
| 3 |
| 4 |
(2)-14-[1-(1-0.5×
| 1 |
| 3 |
(1)-5-3.5÷
×(-
)
=-5-
×
×(-
)
=-5+3
=-2;
(2)-14-[1-(1-0.5×
)]×[2-(-3)2]
=-1-[1-(1-
)]×(2-9)
=-1-(1-1+
)×(-7)
=-1-
×(-7)
=-1+
=
.
| 7 |
| 8 |
| 3 |
| 4 |
=-5-
| 7 |
| 2 |
| 8 |
| 7 |
| 3 |
| 4 |
=-5+3
=-2;
(2)-14-[1-(1-0.5×
| 1 |
| 3 |
=-1-[1-(1-
| 1 |
| 6 |
=-1-(1-1+
| 1 |
| 6 |
=-1-
| 1 |
| 6 |
=-1+
| 7 |
| 6 |
=
| 1 |
| 6 |
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