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덧셈 2자리 X 2자리

	5	3
	8	2
1	3	5

		3	7
		3	6
		7	3

		2	7
		2	3
		5	0

	5	9
	6	0
1	1	9

		1	1
		1	1
		2	2

	2	0
	8	1
1	0	1

	6	7
	5	2
1	1	9

	6	1
	6	5
1	2	6

	4	7
	6	6
1	1	3

		5	1
		2	6
		7	7

		1	5
		5	3
		6	8

		2	9
		6	2
		9	1

	2	6
	9	5
1	2	1

		7	1
		1	2
		8	3

		3	4
		6	5
		9	9