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소숫점: 1자리 덧셈20

1
2.7
+
4.8
=
7.5
2
3.3
+
9.4
=
12.7
3
5.9
+
1.8
=
7.7
4
8.1
+
6.5
=
14.6
5
3.4
+
2.9
=
6.3
6
2.3
+
8.5
=
10.8
7
2.7
+
2.5
=
5.2
8
7.2
+
7.2
=
14.4
9
8.5
+
6.5
=
15
10
6.4
+
5.4
=
11.8
11
5.1
+
5.2
=
10.3
12
9.1
+
4.1
=
13.2
13
8.4
+
5.2
=
13.6
14
3.9
+
3.5
=
7.4
15
2.2
+
1.1
=
3.3