Arithmetic Grade Three

Lesson Twenty-five: Adding To Check Answer

You can add to check your answer to a subtraction problem:
You subtract 11 from 55 and you get 44. To double check and make sure your answer is right you add 44 and 11 together to get 55.
You subtract 13 from 49 and get 36. When you add 36 and 13 you get 49 and so you know you got the right answer!

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