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소숫점: 1자리 덧셈20

1
2.8
+
3.8
=
6.6
2
4.1
+
6.8
=
10.9
3
3.8
+
9.5
=
13.3
4
8.9
+
2.5
=
11.4
5
3.8
+
4.8
=
8.6
6
4.9
+
3.1
=
8
7
2.7
+
1.1
=
3.8
8
2.4
+
2.2
=
4.6
9
6.9
+
7.3
=
14.2
10
2.3
+
2.5
=
4.8
11
1.4
+
6.2
=
7.6
12
2.5
+
9.5
=
12
13
6.1
+
1.4
=
7.5
14
2.1
+
6.9
=
9
15
5.7
+
8.4
=
14.1