45
12 + 15 + 63 + 12 + 24 + 34 + 23 + 15 = 198
The answer is 270. Simply add up all of the numbers arithmetically like you would for two plus two. To make sure the answer is correct, check your work using a calculator.
55 + 34 + 31 + 27 + 21 + 21 + 20 + 17 + 15 + 15 = 256
15 plus 38 is 53
It equals 285
15 x 6 or the long way is 90
n plus 15.n plus 15.n plus 15.n plus 15.
45
1862180
42
82