الشقلب يقلب
*17)(99999999999999999+99999999999999999)=899999999999999991.ومنه :1449 +1449 = 8(139)10+5
ومنه :1449 + 1449 = 8 (139) 15ومنه :1449 + 1449 =8 (9) 13+15ومنه :1449 + 1449 = 9828.*18)(999999999999999999)+(999999999999999999)=8999999999999999991.ومنه:
1539+ 1539 = 8 (144+ 3) 6 +10
ومنه:
1539 +1539 = 8(147) 16
ومنه:
1539 + 1539 = 8 (7) 14 +16
ومنه:
1539 + 1539 = 8 7 30.
*19)
9999999999999999999+9999999999999999999= 89999999999999999991.
ومنه:
(9*18) 9 + (9*18) 9 = 8 (9*17 + 2) 7 + 10
ومنه:
1629 +1629 = 8 ( 155) 17
ومنه:
1629 +1629 = 8 (5) 15+17
ومنه:
1629 +1629 = 8 5 32