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SUMA0123456789
123456
234567891011
3456789101112
45678910111213
567891011121314
6789101112131415
78910111213141516
891011121314151617
9101112131415161718
10 + 0 = 1010 + 1 = 1110 + 2 = 1210 + 3 = 1310 + 4 = 1410 + 5 = 1510 + 6 = 1610 + 7 = 1710 + 8 = 1810 + 9 = 1910 + 10 = 20
RESTA1817161514131211109
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-19876543210