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뺄셈 2자리 - 1자리

		2	2
			1
		2	1

		8	8
			2
		8	6

		2	3
			1
		2	2

		7	6
			5
		7	1

		3	7
			6
		3	1

		2	5
			5
		2	0

		3	6
			8
		2	8

		3	9
			9
		3	0

		2	7
			8
		1	9

		6	0
			7
		5	3

		2	0
			1
		1	9

		2	9
			4
		2	5

		6	2
			6
		5	6

		5	2
			4
		4	8

		6	1
			9
		5	2