题目内容
计算:
(1)(-6)÷(-4)÷(-1
);
(2)(-16)÷[(-
)÷(-
)];
(3)(-5)÷(-1
)×
×(-2
)÷7.
(1)(-6)÷(-4)÷(-1
| 1 |
| 5 |
(2)(-16)÷[(-
| 1 |
| 16 |
| 1 |
| 64 |
(3)(-5)÷(-1
| 2 |
| 7 |
| 4 |
| 5 |
| 1 |
| 4 |
(1)原式=-(6÷4÷
),
=-(6×
×
),
=-
;
(2)原式=(-16)÷(
×64)
=-16÷4
=-4;
(3)原式=-(5×
×
×
×
)
=-1.
| 6 |
| 5 |
=-(6×
| 1 |
| 4 |
| 5 |
| 6 |
=-
| 5 |
| 4 |
(2)原式=(-16)÷(
| 1 |
| 16 |
=-16÷4
=-4;
(3)原式=-(5×
| 7 |
| 9 |
| 4 |
| 5 |
| 9 |
| 4 |
| 1 |
| 7 |
=-1.
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