6 + 7 = 13(Sum means add)
The sum of 7 & 13 = 7 + 13 = 20
19
13 + 7 + 4 = 24
It is 6+7 = 13.
The sum, meaning you add them together. 7+5=13.
13 and 7
3 + 23 7 + 19 13 + 13
13 + 7 = 20 13 - 7 = 6
Subtraction: 20 -7 = 13
13
When you add 8 and 5 the sum will be 13. On the other hand when you add 6 and 7 the sum will be 13. That's why it's equal to 13.