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뺄셈 2자리 - 1자리

		2	4
			4
		2	0

		7	7
			2
		7	5

		9	4
			4
		9	0

		4	5
			5
		4	0

		2	2
			4
		1	8

		9	5
			4
		9	1

		2	6
			3
		2	3

		1	8
			9
			9

		2	2
			6
		1	6

		2	0
			6
		1	4

		1	7
			3
		1	4

		2	8
			6
		2	2

		1	3
			1
		1	2

		2	4
			1
		2	3

		6	3
			5
		5	8