问题 解答题
计算下面各题
8.6×8
2
5
+8.6÷
5
8

1
4
÷[
7
8
-(
3
8
+
1
4
)]

5
2
×12×
4
3

34÷
53
54
答案

8.6×8

2
5
+8.6÷
5
8

=8.6×8

2
5
+8.6×
8
5

=8.6×(8

2
5
+
8
5
),

=8.6×10,

=86;

1
4
÷[
7
8
-(
3
8
+
1
4
)],

=

1
4
÷[
7
8
-
5
8
],

=

1
4
÷
2
8

=

1
4
×
8
2

=1;

5
2
×12×
4
3

=30×

4
3

=40;

34÷

53
54

=34×

54
53

=34

34
53

故答案为:86;1;40;34

34
53

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