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脱式计算(能简便的要简便计算)35÷[(15+13)÷29]14×37+47÷44.2×102-8.456÷(1-920)×153.64÷4+4.36×25%1110÷[56×(37-38)]36-23X=1838:x=6.

题目详情
脱式计算(能简便的要简便计算)
3
5
÷[(
1
5
+
1
3
)÷
2
9
]
1
4
×
3
7
+
4
7
÷4       
4.2×102-8.4   
 
5
6
÷(1-
9
20
)×
1
5
3.64÷4+4.36×25%      1110÷[56×(
3
7
-
3
8
)]
36-
2
3
X=18     
3
8
:x=6.
▼优质解答
答案和解析
(1)
3
5
÷[(
1
5
+
1
3
)÷
2
9
],
=
3
5
÷[
8
15
÷
2
9
],
=
3
5
÷
12
5

=
1
4


(2)
1
4
×
3
7
+
4
7
÷4,
=
1
4
×
3
7
+
4
7
×
1
4

=
1
4
×(
3
7
+
4
7
),
=
1
4
×1,
=
1
4


(3)4.2×102-8.4,
=4.2×102-4.2×2,
=4.2×(102-2),
=4.2×100,
=420;

(4)
5
6
÷(1-
9
20
)×
1
5

=
5
6
÷
11
20
×
1
5

=
50
33
×
1
5

=
作业帮用户 2016-11-20