487×37+487×63=487×37+63=487×100=48700
43 - 1
135 - 45
105 - 35
60 - 30
37 - 1
27 - 9
72 - 36
53 - 1
96 - 48
196 - 98
69 -23
57 - 19
250 -125
45 - 15
169 - 13
58 - 29
171 - 57
111 - 37
33 - 11
75 - 25
. . .
1 0 1 0 1 0
- 2 0 2 0 2
__________
8 0 8 0 8
. . . . .
1 0 0 0 0 0
- 9 9 9 9 9
_____________
1