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분수: 분모 1자리 덧셈4분수1

1
1 3
+
3 3
=
4 3
2
3 4
+
1 4
=
4 4
3
+
1
=
1 1
3
1 7
+
2 7
=
3 7
4
2 2
+
3 2
=
5 2
5
3 9
+
6 9
=
9 9
3
+
6
=
1 1
6
1 9
+
7 9
=
8 9
7
7 3
+
9 3
=
16 3
8
1 6
+
3 6
=
4 6
1
+
3
=
2 3
9
3 2
+
4 2
=
7 2
10
4 7
+
1 7
=
5 7
11
1 5
+
3 5
=
4 5
12
3 9
+
1 9
=
4 9
13
1 6
+
2 6
=
3 6
1
+
2
=
1 2
14
1 6
+
4 6
=
5 6
15
4 3
+
2 3
=
6 3
4
+
2
=
2 1