来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/21 07:32:09
(1)
11
18×
9
10+
11
18÷10
=
11
18×(
9
10+
1
10)
=
11
18×1
=
11
18
(2)3-
5
9×
7
20-
11
36
=3-
7
36-
11
36
=3-(
7
36+
11
36)
=3−
1
2
=2
1
2
(3)9.9×17.6
=(10-0.1)×17.6
=10×17.6-1.76
=174.24
(4)8.6-(5.6+4.8)÷1.3
=8.6-10.4÷1.3
=8.6-8
=0.6
(5)
4
9÷[1−(
2
5+
1
10)×
4
3]
=
4
9÷[1-
1
2×
4
3]
=
4
9÷
1
3
=
4
3