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뺄셈 2자리 - 1자리

		2	4
			1
		2	3

		2	8
			8
		2	0

		2	7
			2
		2	5

		1	8
			1
		1	7

		9	5
			2
		9	3

		4	4
			3
		4	1

		9	2
			2
		9	0

		4	4
			2
		4	2

		9	6
			1
		9	5

		6	5
			5
		6	0

		4	6
			5
		4	1

		6	3
			2
		6	1

		2	9
			9
		2	0

		4	3
			4
		3	9

		1	9
			2
		1	7