用简便方法计算下面各题.(1)54×120+45÷20+120(2)(16+18+124)×24(3)37?(34?47)(4)3×37十4÷7

2025-03-09 08:05:29
推荐回答(1个)
回答1:

(1)54×
1
20
+45÷20+
1
20

=(54+45+1)×
1
20

=100×
1
20

=5;

(2)(
1
6
+
1
8
+
1
24
)
×24,
=
1
6
×24+
1
8
×24+
1
24
×24

=4+3+1,
=8;

(3)
3
7
?(
3
4
?
4
7
)

=
3
7
+
4
7
?
3
4

=1?
3
4

=
1
4


(4)3×
3
7
十4÷
7
3

=(3+4)×
3
7

=7×
3
7

=3.