问题 解答题
脱式计算
1
4
-
1
12
)÷
3
8

2
9
+
1
2
÷
4
5
+
3
8

1
6
×
8
3
÷(
4
5
-
8
15

[3.2×(1-
5
8
)+
18
5
12
25
答案

1
4
-
1
12
)÷
3
8

=

1
6
×
8
3

=

4
9

2
9
+
1
2
÷
4
5
+
3
8

=

2
9
+
5
8
+
3
8

=

2
9
+(
5
8
+
3
8
),

=

2
9
+1,

=1

2
9

1
6
×
8
3
÷(
4
5
-
8
15

=

4
9
÷
4
15

=

5
3

[3.2×(1-

5
8
)+
18
5
12
25

=[

16
5
×
3
8
+
18
5
12
25

=[

6
5
+
18
5
25
12

=

24
5
×
25
12

=10.

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