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뺄셈 2자리 - 1자리

		2	8
			1
		2	7

		2	7
			7
		2	0

		1	3
			4
			9

		4	7
			7
		4	0

		4	1
			6
		3	5

		3	5
			6
		2	9

		1	6
			3
		1	3

		4	7
			4
		4	3

		9	7
			5
		9	2

		3	0
			2
		2	8

		7	4
			4
		7	0

		6	8
			8
		6	0

		2	5
			4
		2	1

		5	0
			5
		4	5

		5	1
			3
		4	8