# Question Video: Subtracting One-Digit Numbers Using a Related Addition Sentence Mathematics • 1st Grade

Complete: 7 − 3 = ＿. You can use the following addition sentence to help you. 3 + ＿ = 7

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### Video Transcript

Complete: seven subtract three equals what. You can use the following addition sentence to help you. Three plus what equals seven.

In this question, we have to find seven take away three, and we’re given a partial addition sentence to help. Three plus something equals seven. We know the whole amount is seven, and we know that one of the parts is three. So to help us find seven take away three, we can think about the number that we need to add to three to make seven. We could use a 10 frame and some counters. We’ve got three counters. How many more do we need to add to make seven? One, two, three, four. Three and four are a pair of numbers which makes seven. If three plus four equals seven, then seven take away three equals four. The missing number is four. Seven take away three equals four.