Schriftliches Subtrahieren/Algorithmus/Grundliste/Aufgabe/Lösung

x-y	1	2	3	4	5	6	7	8	9
1	${}0$	${}\times$	${}\times$	${}\times$	${}\times$	${}\times$	${}\times$	${}\times$	${}\times$
2	${}1$	${}0$	${}\times$	${}\times$	${}\times$	${}\times$	${}\times$	${}\times$	${}\times$
3	${}2$	${}1$	${}0$	${}\times$	${}\times$	${}\times$	${}\times$	${}\times$	${}\times$
4	${}3$	${}2$	${}1$	${}0$	${}\times$	${}\times$	${}\times$	${}\times$	${}\times$
5	${}4$	${}3$	${}2$	${}1$	${}0$	${}\times$	${}\times$	${}\times$	${}\times$
6	${}5$	${}4$	${}3$	${}2$	${}1$	${}0$	${}\times$	${}\times$	${}\times$
7	${}6$	${}5$	${}4$	${}3$	${}2$	${}1$	${}0$	${}\times$	${}\times$
8	${}7$	${}6$	${}5$	${}4$	${}3$	${}2$	${}1$	${}0$	${}\times$
9	${}8$	${}7$	${}6$	${}5$	${}4$	${}3$	${}2$	${}1$	${}0$
10	${}9$	${}8$	${}7$	${}6$	${}5$	${}4$	${}3$	${}2$	${}1$
11	${}\star$	${}9$	${}8$	${}7$	${}6$	${}5$	${}4$	${}3$	${}2$
12	${}\star$	${}\star$	${}9$	${}8$	${}7$	${}6$	${}5$	${}4$	${}3$
13	${}\star$	${}\star$	${}\star$	${}9$	${}8$	${}7$	${}6$	${}5$	${}4$
14	${}\star$	${}\star$	${}\star$	${}\star$	${}9$	${}8$	${}7$	${}6$	${}5$
15	${}\star$	${}\star$	${}\star$	${}\star$	${}\star$	${}9$	${}8$	${}7$	${}6$
16	${}\star$	${}\star$	${}\star$	${}\star$	${}\star$	${}\star$	${}9$	${}8$	${}7$
17	${}\star$	${}\star$	${}\star$	${}\star$	${}\star$	${}\star$	${}\star$	${}9$	${}8$
18	${}\star$	${}\star$	${}\star$	${}\star$	${}\star$	${}\star$	${}\star$	${}\star$	${}9$

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