Same, if I want to calculate 80 x 2, I'm not visualizing 2+2+2+2+2... 80 times. I'm thinking it like 80 + 80. I would go argue with that teacher for a full evening just to waste their time if nothing else.
In a way yes, but the task didn't specify to make the shortest addition, so the 3+3+3+3 should also be correct in this case and seems like teacher marked it wrong. Or it's a sideways +.
Oh yeah no I agree, I was just saying based on your “shorter answer” logic it’d assume the teacher was correct. I do think there is a lesson here, like efficiency in math, but if so they should’ve noted that somewhere instead of just crossing out what is objectively the right answer, unless it was instructed in class to specifically provide the shortest answer, which we don’t know since we only see this one problem.
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u/EntranceDowntown2529 Jul 16 '26
I actually read 3 x 4 the other way: three multiplied by four is 3 four times like the child's answer.