How could you check the answer to 27 – 15 = 12 using addition?

Subtraction and addition are inverse arithmetic operations. 

Answer: To check the answer we will add 12 + 15 to get 27.

Let's see the solution.

Explanation:

To check 27 - 15 = 12, we will add 12 and 15 to see if we get back 27

⇒ 12 + 15 = 27 by addition.

Thus, to check 27 - 15 = 12, we will add 12 and 15 to get 27.