来源:学生作业帮 编辑:作业帮 分类:综合作业 时间:2024/10/05 06:56:09
(1)
5
6+
11
14,
=
35
42+
33
42,
=
34
21;
(2)
5
6−(
4
9−
1
3),
=
5
6-
1
9,
=
13
18;
(3)
4
5−
4
11+
1
5−
7
11,
=(
4
5+
1
5)-(
4
11+
7
11),
=1-1,
=0;
(4)
3
4+
6
13+
7
13−
1
4,
=(
3
4-
1
4)+(
6
13+
7
13),
=
1
2+1,
=1
1
2.