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뺄셈 2자리 - 1자리

		2	0
			1
		1	9

		9	8
			2
		9	6

		2	3
			2
		2	1

		8	4
			2
		8	2

		4	8
			3
		4	5

		9	5
			2
		9	3

		6	5
			3
		6	2

		2	8
			5
		2	3

		5	6
			4
		5	2

		6	4
			3
		6	1

		6	2
			5
		5	7

		5	2
			4
		4	8

		9	9
			7
		9	2

		5	6
			6
		5	0

		1	8
			8
		1	0