Video: Finding the Unknown Minuend in Subtraction Sentences with Numbers up to 20

Fill in the blank: _ − 7 = 8.

01:06

Video Transcript

Fill in the blank. What take away seven equals eight?

We have to find the missing number. Which number can we take seven from to give us eight? This bar model helps us to understand the problem. The orange bar represents the number we started with, which is the missing number. If we take seven from that number, we’re left with eight.

If we were to add together seven and eight, that would give us our missing number. Seven plus eight equals 15. So we can say that 15 take away seven equals eight. The missing number is 15.

15 take away seven equals eight.

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