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뺄셈 2자리 - 1자리

		2	5
			4
		2	1

		1	9
			4
		1	5

		3	3
			2
		3	1

		4	4
			4
		4	0

		3	8
			4
		3	4

		3	4
			2
		3	2

		3	7
			3
		3	4

		9	9
			4
		9	5

		6	7
			3
		6	4

		7	1
			4
		6	7

		2	3
			3
		2	0

		1	0
			5
			5

		9	2
			5
		8	7

		2	6
			2
		2	4

		4	2
			2
		4	0