问题 解答题
计算.
(1)(-
4
7
)×5×(-1
3
4
)×(-0.2)
;       
(2)(-12)×(
1
4
-
1
3
)
答案

(1)(-

4
7
)×5×(-1
3
4
)×(-0.2),

=-

4
7
×5×
7
4
×
1
5

=-1;

(2)(-12)×(

1
4
-
1
3
),

=

1
4
×(-12)-
1
3
×(-12),

=-3+4,

=1.

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