1.300-250=50
2.655-300=355
3.999-348=651
4.789-465=324
5.657-543=114
6.468-305=163
7.587-543=44
8.325-256=69
9.865-487=378
10.976-967=9
11.597-375=222
12.864-567=297
13.795-321=474
14.647-222=425
15.593-333=260
16.487-213=274
17.398-211=187
18.265-111=154
19.110-107=3
20.900-843=57