It is: 13+2 = 15
-13
4
It's not possible. For two numbers to have a sum of 13, one would have to be even, that is, divisible by 2.
13
13
The sum of 4/20 and 2/13 is 23/65
to sum two numbers you add them together then to get twice that you multiply the sum by 2 e.g. if the two numbers are 5 and 8 the sum = 5 + 8 = 13 twice that is 13 x 2 = 26
sum = 48
To find the sum of 5 and 8, you add them together: 5 + 8 = 13. To divide this sum by 2, you perform the operation 13 ÷ 2 = 6.5. Therefore, the result of summing 5 and 8 and then dividing by 2 is 6.5.
13
13
13