试题与答案

脱式计算16÷(34+12)12÷[(415+35)×713]49×[34-(7

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题型：解答题

题目：

脱式计算
16÷(
3
4
+
1
2
)
1
2
÷[(
4
15
+
3
5
)×
7
13
]
4
9
×[
3
4
-(
7
16
-
1
4
)]
[1-(
2
3
-
1
2
)]÷
8
15
．

答案：

16÷（

3
4
+
1
2
），

=16÷

5
4
，

=12.8；

1
2
÷[（
4
15
+
3
5
）×
7
13
]，

=

1
2
÷[
13
15
×
7
13
]，

=

1
2
÷
7
15
，

=1

1
14
；

4
9
×[
3
4
-（
7
16
-
1
4
）]，

=

4
9
×[
3
4
-
3
16
]，

=

4
9
×
9
16
，

=

1
4
；

[1-（

2
3
-
1
2
）]÷
8
15
，

=[1-

1
6
]÷
8
15
，

=

5
6
÷
8
15
，

=1

9
16
．

考点：分数的简便算法
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