Question

Which of the following addition equation can be used to solve the following problem?
$12–7=?$

• A. $12+7=19$
• B. $7+5=12$
• C. $7+7=12$
• D. $7+6=12$

Answer 1

The correct option is B $7+5=12$

We have to find the difference between $12$ and $7$.
We know that if we add the difference and the smaller number of a subtraction equation, we will always get the bigger number as the sum.
Here, if we added the missing difference and $7$, we will get $12$ as the sum.
So, the addition equations that can be framed are $7+?=12$ or $?+7=12$.



We find that the missing number is $5$ and the equations are $7+5=12$ or $5+7=12$.

Hence, Option C is correct, and the related addition equation framed is $7+5=12$.