18 + 36 + 45 + 9 + 9 + 54 + 27 + 72 + 81 = 351
(18 + 36) + (45 - 27) = 54 + 18 = 72
The sum of -27 and 45 is 18.
9, 18, 27, 36, 45 . . . . .
45
9, 18, 27, 36, 45, 54.
(18 + 36) + (45 - 27) = 54 + 18 = 72
The GCF of 18 and 27 is 9.
-45 + 18 = -27
18 + 27 = 45
9,18,27,36,45,54
The sum of -27 and 45 is 18.
9 18 27 36 45 54 63 72 81 909, 18, 27, 36, 45, 54
8,16,24,32,40
699, 18, 27, 36, 45, 54, 63
9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99.
9, 18, 27, 36, 45
9, 18, 27, 36, 45.