题目内容

脱式计算.
1
2
÷
1
4
+
1
2
÷
1
4
5÷[(
2
3
+
1
5
)×
1
13
]
8
9
÷
4
7
÷0.875
[
1
2
-(
3
4
-
3
5
)
]÷
7
10
1
2
÷
1
4
+
1
2
÷
1
4

=2+2,
=4;

5÷[(
2
3
+
1
5
)×
1
13
],
=5÷[
13
15
×
1
13
],
=5÷
1
15

=75;

8
9
÷
4
7
÷
0.875,
=
14
9
÷
0.875,
=1
7
9


[
1
2
-(
3
4
-
3
5
)
]÷
7
10

=[
1
2
-
3
20
]÷
7
10

=
7
20
÷
7
10

=
1
2
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