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뺄셈: 3 - 13-1

3	1	9
		6
3	1	3

9	2	7
		4
9	2	3

5	5	4
		1
5	5	3

9	0	1
		4
8	9	7

2	3	6
		4
2	3	2

2	8	0
		2
2	7	8

6	1	3
		6
6	0	7

1	2	9
		2
1	2	7

3	5	7
		3
3	5	4

8	1	5
		3
8	1	2

2	2	3
		3
2	2	0

6	0	5
		1
6	0	4

8	0	6
		8
7	9	8

3	4	1
		3
3	3	8

3	3	3
		3
3	3	0