问题 解答题
用简便方法计算.
(1)8-
2
3
÷
1
4
-
4
3
(2)77×
4
5
+23×
4
5
答案

(1)8-

2
3
÷
1
4
-
4
3

=8-(

8
3
+
4
3
),

=8-4,

=4;

(2)77×

4
5
+23×
4
5

=(77+23)×

4
5

=100×

4
5

=80.

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