问题 解答题
计算:
(1)(-3)÷(-1
3
4
)×0.75÷(-
3
7
)×(-6);
(2)(-
1
5
)×(-0.1)÷
1
25
×(-10);
(3)[(-72)×(-
2
3
)]×[(-
3
5
)÷(-
8
15
)].
答案

(1)原式=3×

7
3
×
3
4
×
7
3
×6

=

147
2

(2)原式=-(

1
5
×
1
10
×25×10)

=-5;

(3)原式=(72×

2
3
)×(
3
5
×
15
8

=48×

9
8

=54.

单项选择题
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