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소숫점: 1자리 덧셈20

1
2.1
+
6.4
=
8.5
2
1.1
+
4.4
=
5.5
3
2.4
+
4.1
=
6.5
4
9.1
+
5.7
=
14.8
5
4.4
+
4.9
=
9.3
6
5.9
+
9.1
=
15
7
7.8
+
4.9
=
12.7
8
5.5
+
4.4
=
9.9
9
4.5
+
3.3
=
7.8
10
3.6
+
2.2
=
5.8
11
6.5
+
6.3
=
12.8
12
3.1
+
7.2
=
10.3
13
5.7
+
4.9
=
10.6
14
3.3
+
5.4
=
8.7
15
6.3
+
2.1
=
8.4