Subtracting by adding up 65-39

26

Step-by-step explanation:

In order to subtract by adding up 65-39, we need to add - 39 to the value of 65. This can be rewritten in this way;

65 + (-39)

The equation above is similar to the one given because the product of a minus and a plus sign will still give us back a minus sign.

on solving;

65 + (-39) = 26