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덧셈: 2 + 1

1

		2	3
			4
		2	7

2

		3	1
			4
		3	5

3

		1	9
			1
		2	0

4

		5	0
			2
		5	2

5

		5	6
			9
		6	5

6

		1	0
			2
		1	2

7

		1	2
			9
		2	1

8

		4	5
			2
		4	7

9

		6	1
			5
		6	6

10

		5	1
			9
		6	0

11

		2	4
			5
		2	9

12

		7	1
			3
		7	4

13

		8	2
			5
		8	7

14

		9	3
			5
		9	8

15

		5	5
			1
		5	6

▲

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