题目内容
计算:
(1)-
×(-1
)÷(-2
);
(2)15÷(-5)÷(-1
);
(3)(-3.5)÷
×(-
).
(1)-
| 3 |
| 4 |
| 1 |
| 2 |
| 1 |
| 4 |
(2)15÷(-5)÷(-1
| 1 |
| 5 |
(3)(-3.5)÷
| 7 |
| 8 |
| 3 |
| 4 |
(1)-
×(-1
)÷(-2
)
=-
×(-
)×(-
)
=-1.
(2)15÷(-5)÷(-1
)
=15×(-
)×(-
)
=
.
(3)(-3.5)÷
×(-
)
=(-
)×
×(-
)
=3.
| 3 |
| 4 |
| 1 |
| 2 |
| 1 |
| 4 |
=-
| 3 |
| 4 |
| 3 |
| 2 |
| 8 |
| 9 |
=-1.
(2)15÷(-5)÷(-1
| 1 |
| 5 |
=15×(-
| 1 |
| 5 |
| 5 |
| 6 |
=
| 5 |
| 2 |
(3)(-3.5)÷
| 7 |
| 8 |
| 3 |
| 4 |
=(-
| 7 |
| 2 |
| 8 |
| 7 |
| 3 |
| 4 |
=3.
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