题目内容
计算:
①(-0.66)÷9×(-3);
②(-
+
)×0.6÷(-1
)×|-2.5|;
③+(-8)÷[(-
)×(-
)]÷(-2
).
①(-0.66)÷9×(-3);
②(-
| 1 |
| 2 |
| 1 |
| 3 |
| 3 |
| 4 |
③+(-8)÷[(-
| 3 |
| 8 |
| 3 |
| 8 |
| 1 |
| 4 |
①原式=-0.66×
×(-3)=0.22;
②原式=-
×0.6×(-
)×
=-
×(-
)×
=
;
③原式=-8÷
÷(-
)=-
÷(-
)=25
.
| 1 |
| 9 |
②原式=-
| 1 |
| 6 |
| 4 |
| 7 |
| 5 |
| 2 |
| 1 |
| 10 |
| 4 |
| 7 |
| 5 |
| 2 |
| 1 |
| 7 |
③原式=-8÷
| 9 |
| 64 |
| 9 |
| 4 |
| 512 |
| 9 |
| 9 |
| 4 |
| 23 |
| 81 |
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