Question Video: Identifying Wrong Number Sentences Mathematics • 1st Grade

Which number sentence is wrong? [A] 12 + 4 = 8 [B] 12 − 4 = 8 [C] 4 + 8 = 12 [D] 12 − 8 = 4 [E] 8 + 4 = 12.

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Video Transcript

Which number sentence is wrong? 12 plus four equals eight. 12 take away four equals eight. Four plus eight equals 12. 12 take away eight equals four. Or eight plus four equals 12.

The first number sentence tells us that 12 plus four equals eight. We can see from the bar model that this number sentence is wrong. 12 plus four is 16. So the first number sentence is wrong. 12 take away four is eight. Four plus eight is 12. 12 take away eight is four. And eight plus four equals 12.

The number sentence which is wrong is the first one, 12 plus four equals eight, because 12 take away four equals eight. And 12 plus four equals 16.

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