(15*
999999999999999+999999999999999=1999999999999998 |
1269+ 1269 =10+ 3(6 +9+9+9+9+9+9+9+9+9+9+9+9+9)8............>
ومنه:
1269 +1269 =13 (123)8.........>
ومنه:
13+12 (3) 8.......>
ومنه:
.1269+1269=2538
(16*
9999999999999999+9999999999999999=19999999999999998 |
..............>
ومنه:
1359+1359=10 4(5+9+9+9+9+9+9+9+9+9+9+9+9+9+9) 8...............>
ومنه:
1359+1359=14 (131) 8.......>
ومنه:
1359+1359=14+13 (1) 8.......>
ومنه:
1359+1359=18 27.
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