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덧셈: 2 + 1

1

		3	7
			2
		3	9

2

		7	3
			1
		7	4

3

		2	0
			7
		2	7

4

		5	8
			5
		6	3

5

		2	1
			4
		2	5

6

		5	6
			3
		5	9

7

		6	2
			5
		6	7

8

		2	5
			2
		2	7

9

		8	0
			4
		8	4

10

		2	1
			2
		2	3

11

		2	6
			1
		2	7

12

		6	3
			6
		6	9

13

		5	5
			3
		5	8

14

		1	3
			8
		2	1

15

		6	3
			5
		6	8

▲

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