an equation where the smaller numbers in the subtraction equation are added to give the larger number.
First, identify the subtraction equation. It is 12 - 7, which equals 5.
Now, take the two smaller numbers, 7 and 5, from the subtraction equation.
To form a related addition equation, put the smaller numbers as addends, i.e., numbers that are to be added together. Here, the addends are 7 and 5.
Adding these two numbers gives a sum of 12, which is the largest number in our subtraction equation.
Therefore, the related addition equation is 7 + 5 = .
Answer: 12