计算下面各题,注意使简便方法计算.118-( 56+38)=59+411+611+49=5-37-47=12-37-13

2024-12-29 03:38:53
推荐回答(1个)
回答1:

11
8
-( 
5
6
+
3
8

=
11
8
-
3
8
-
5
6

=1-
5
6

=
1
6

5
9
+
4
11
+
6
11
+
4
9

=(
5
9
+
4
9
)+(
4
11
+
6
11

=1
10
11

③5-
3
7
-
4
7

=5-(
3
7
+
4
7

=5-1
=4
④12-
3
7
-
1
3

=12-(
3
7
+
1
3

=12-
16
21

=11
5
21