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怎样算简便就怎样算①18-920÷9②(24+49)÷4③35×(34+12)④23÷[(4-56)÷14].

题目详情
怎样算简便就怎样算
①18-
9
20
÷9
②(24+
4
9
)÷4    
3
5
×(
3
4
+
1
2

2
3
÷[(4-
5
6
÷
1
4
].
▼优质解答
答案和解析
①18-
9
20
÷9
=18-
9
20
×
1
9

=18-
1
20

=17
19
20


②(24+
4
9
)÷4 
=24÷4+
4
9
÷4 
=6+
1
9

=6
1
9


3
5
×(
3
4
+
1
2

=
3
5
×
5
4

=
3
4


2
3
÷[(4-
5
6
÷
1
4
]
=
2
3
÷[
19
6
×4]
=
2
3
÷
38
3

=
2
3
×
3
38

=
1
19