问题 解答题
计算:(1)(-1
1
4
)×(-3
4
5
)

(2)-13×
2
3
-0.34×
2
7
+
1
3
×(-13)-
5
7
×0.34
答案

(1)(-1

1
4
)×(-3
4
5
),

=

5
4
×
19
5

=

19
4

(2)-13×

2
3
-0.34×
2
7
+
1
3
×(-13)-
5
7
×0.34

=-13-0.34,

=-13.34.

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