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덧셈 2자리 X 2자리

		2	7
		3	4
		6	1

		2	7
		6	0
		8	7

		4	7
		1	9
		6	6

		2	2
		2	7
		4	9

		4	0
		3	5
		7	5

		4	2
		5	2
		9	4

	9	4
	6	8
1	6	2

	9	2
	9	5
1	8	7

		2	4
		1	1
		3	5

	6	3
	8	5
1	4	8

		6	1
		3	4
		9	5

	7	5
	2	7
1	0	2

		2	1
		5	3
		7	4

	4	0
	7	7
1	1	7

		1	9
		2	3
		4	2