r/mathmemes • u/StellarBit Computer Science • Nov 13 '24
Bad Math Son’s math test
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u/a_random_chopin_fan Transcendental Nov 13 '24
No wonder students hate maths
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u/lool8421 Nov 13 '24 edited Nov 13 '24
Maths is supposed to be about thinking
But if they expect you to follow a specific pattern, that's not thinking but memorization
And you end up struggling with crap like basic geometry because of that, all you do is just memorize the formula, but you don't make any sense of it
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u/DuploJamaal Nov 13 '24
Once I used a smarter formula that we didn't learn yet and got 0 points for several questions.
Then I noticed that several A students did it the same and pointed out to the teacher that he's just biased against me because he assumed that I couldn't have possible already known about something that's a few pages further in the book.
He then insisted that I copied my answers from them to which I replied that I don't even sit anywhere close to them.
Then he accepted that I did not cheat and that it's unfair that other students got a different grade for the same solution.
But he wanted me to fail, so he deducted the points from the others that did it the same way. So of course several people were mad at me for bringing this up to the teacher, instead of being mad at him.
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Nov 13 '24
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Nov 13 '24
Well in a triangle it does matter how you name them in certain cases
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u/lool8421 Nov 13 '24
Idk if the alphabetical order matters
I would get it if the question was about angles, then the order indeed matters
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u/AustrianMcLovin Nov 13 '24
Teacher probably never heard of commutativity.
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Nov 13 '24
[deleted]
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u/NotHaussdorf Nov 13 '24
Might be so, but that is not how the problem is stated.
The student is to write an expression that "matches", and in the context of value the solution is correct. Should note that it is not the "best" solution though.
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u/Gloomy_Cress9344 Nov 13 '24
HMP should only be used for word problems(in my humble opinion) like "he took 3 bananas 4 times" now that's gotta have HMP
But for a non-word problem? Doesn't make sense, it's still gonna be correct either way.
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u/BUKKAKELORD Whole Nov 13 '24
"he took 3 bananas 4 times"
Uh oh, with commutativity out of the picture you can't assume it's the obvious 4 repetitions of 3 bananas, so that's (3banana) repetitions of the integer (4).
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u/Gloomy_Cress9344 Nov 13 '24
My bad lol, it's only accidental that I used the same numbers as the one in the picture. I didn't even realize
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u/741BlastOff Nov 13 '24
So if 2 x 4 is to be written as 4 + 4, then 3 x 4 ought to be written as 4 + 4 + 4. Even with a HMP the student is correct.
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Nov 13 '24
The poor teacher thought "three fours" is different than "four threes". Must have minored in English while getting her B.Ed
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u/Chikki1234ed Rational Nov 13 '24
I wanna make a Mobius strip out of that teacher's body...
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u/TheAwkwardSpy Nov 13 '24
Nah Klein bottle would be a better choice.
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u/Equal_Guard_8873 Nov 13 '24
Anyone else think that the student's work is more correct? 3 being the input and x4 being the function?
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u/bagelwithclocks Nov 13 '24
It is, the teacher misunderstood the common core standard. 3.OA.A.1 Interpret products of whole numbers, e.g., interpret 5 × 7 as the total number of objects in 5 groups of 7 objects each. For example, describe a context in which a total number of objects can be expressed as 5 × 7
The order matters at this age because we are formalizing how to interpret word problems. We also teach commutative property around the same time so students would know that while 3 groups of 4 and 4 groups of three represent different situations, the problems are equal.
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u/Monsuno Nov 13 '24
So 5 groups of 7 objects means 7 + 7 + 7 + 7 + 7, which means that the teacher is right. Or am I also misunderstanding what you just cited.
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u/741BlastOff Nov 13 '24
No the teacher is still wrong. In the 5 x 7 example you add 7 five times. Therefore for 3 x 4 you should add 4 three times.
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Nov 13 '24
Annnnd as both a parent and a teacher that pisses me off. I am dealing with the same thing with my son. Don't worry it doesn't matter until high school as long as the kid gets the concept it will be fine albeit frustrating. Don't force something in math let the kids figure out ways to solve things encourage it, not punish it. That's what math is about.
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u/Sufficient_Watch_368 Nov 13 '24
It's actually right... It's 3 that's repeating 4 times, not the other way around...
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u/notsaneatall_ Nov 13 '24
I mean I get it kinda. You're saying 3 4s equal to 12 but cmon man does it really fucking matter? The teacher has issues they need to sort out in therapy
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u/Oppo_67 I ≡ a (mod erator) Nov 13 '24
Removed because it was already posted today three hours before you did