The sum of 123 and 654 is 777.
The sum of 123 is 123.
120+80
7272 * * * * * WRONG! Sum from 23 to 123 = (sum from 1 to 123) minus (sum from 1 to 22) = 123*124/2 - 22*23/2 = 7626 - 253 = 7373. NOT 7272!
113+7+3 = 123
The sum of 123 and 2,223,223 is 2,223,346
The sum of 123 and 654 is 777.
The total sum is: 327
123
The sum of 123 is 123.
120+80
7272 * * * * * WRONG! Sum from 23 to 123 = (sum from 1 to 123) minus (sum from 1 to 22) = 123*124/2 - 22*23/2 = 7626 - 253 = 7373. NOT 7272!
Just add all 3 together. What it's really asking for is: first 347 + 886 = 1233 then 1233 + 354 = 1587
113+7+3 = 123
123
It is in the middle: (123+309)/2 = 216
They are: -39 -41 -43 = -123