问题 解答题
计算:
(1)(-6)÷(-4)÷(-1
1
5
);
(2)(-16)÷[(-
1
16
)÷(-
1
64
)];
(3)(-5)÷(-1
2
7
)×
4
5
×(-2
1
4
)÷7.
答案

(1)原式=-(6÷4÷

6
5
),

=-(6×

1
4
×
5
6
),

=-

5
4

(2)原式=(-16)÷(

1
16
×64)

=-16÷4

=-4;

(3)原式=-(5×

7
9
×
4
5
×
9
4
×
1
7

=-1.

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