内容正文:
1 / 2
巧算 2(三数加减有两数同分母)
4
5
+ 1
1
5
−
1
2
=
7
18
−
3
4
+
11
18
=
7
5
−
1
8
+
3
5
=
7
5
+
1
8
+
3
5
=
7
8
+
9
8
+
3
4
=
1
2
−
1
4
+
1
2
=
1
1
4
−
1
6
−
1
6
= 3
3
4
+
1
2
− 1
1
4
=
1
5
+
7
12
−
1
5
=
17
2
−
1
6
−
5
6
=
7
8
−
5
36
+
1
8
=
5
12
+
7
8
+
7
12
=
3
11
+
6
7
+
8
11
=
4
3
−
1
3
+
5
14
=
7
9
−
1
9
−
2
3
=
5
8
+
1
16
−
3
8
=
3
4
+
4
5
+
3
4
=
1
8
−
1
9
+
7
8
=
5
7
−
5
14
−
3
14
= 7
1
2
−
3
8
−
5
8
= 3
1
2
−
1
6
−
5
6
=
3
13
+
5
7
+
10
13
= 1
1
7
−
1
8
+
6
7
=
7
10
+
3
5
+
3
10
=
7
9
−
1
6
+
11
9
=
4
3
−
1
5
−
1
3
=
4
15
+
1
6
−
2
15
=
1
6
−
1
9
+
5
6
=
1
7
+
1
2
+
3
7
=
3
2
−
1
11
−
10
11
=
3
25
+
1
5
−
2
25
=
1
7
+
1
35
+
6
7
=
3
7
+
1
28
−
2
7
=
2
3
−
1
11
+
4
3
=
7
9
−
1
3
−
1
3
=
1
5
−
1
6
+
5
6
=
2 / 2
答案-巧算 2(三数加减,有两数同分母)
1
1
2
1
4
1
7
8
2
1
8
2
3
4
3
4
11
12
3 7
12
7
1
2
31
36
1
7
8
1
6
7
1
5
14
0
5
16
23
10
8
9
1
7
6
1
2
2
1
2
1
5
7
1
7
8
1
3
5
1
5
6
4
5
3
10
8
9
15
14
1
2
6
25
1
1
35
5
28
1
10
11
1
9
13
15
巧算2(三数加减有两数同分母)
答案-巧算2(三数加减,有两数同分母)
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