A sum has to include two or more numbers in the calculation.
51
n + 51
38+51 = 89
51 + 57 = 108
-42
It is: 10 plus 51 = 61
The sum of the numbers between 51 and 150 is equal to 10050 - or 50 x 201 - as there are 50 lots of 201 in the sum.
The consecutive integers whose sum is 51 are 16, 17, and 18.
The sum of 19 and 32 is 51.
51
51 sum means add
The sum of the first 10 counting numbers (1-10) is 51.