问题 解答题
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
答案

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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