Mathematics Stack Exchange
Mathematics Stack Exchange

Questions tagged [education]

For math questions related to the teaching and learning of mathematics. Note that Mathematics Educators Stack Exchange may be a better home for narrowly scoped questions on specific issues in mathematics education.

This tag is for questions that are primarily about mathematics, but are related to mathematics education. Also consider using the or the tag. On the other hand, questions that are primarily about teaching and learning mathematics would be a better fit for MathEducators.SE.

3309 questions
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Mathematical notion

I have the following equation: Then I use the code in R - a mathematical program: This gives me these results: But the right results are: Can anybody help point me in the right direction - I have tried moveing around with the paranthesis…
glensbo
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-5^2 again, why oh why?

I know this has been discussed before (Why is $-5^2=-25$?) but this makes no sense in my head, maybe someone can clarify. To me $-5^2$ means the number $-5$ (a number in $\mathbb R$), squared. It's not $0 - 5^2$ where $-$ is an operation. Put in…
Xavier
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Find a 4-digit number divisible by 9 and 25. Answer is 9000.

Find a 4-digit number divisible by 9 and 25. Answer is 9000. I can find the greatest number which is divisible by 9 and 25 but 9900 != 9000. What am I doing wrong? 9, 25 | 3 3, 25 | 3 1, 25 | 5 1, 5 | 5 1, 1 LCM(9, 25) = 3 * 3 * 5 * 5 =…
nop
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Create 2 set from 1 to 10

In school I learnt to create a set of number or how many sets of number we can create from given numbers. But now, I forgot. Please help me here. I want to know how many sets can be possible to create and I want create 2 number in 1 set from 1 to…
Bel
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Difference between maximum value and maximum

Are they the same? (a) Find the maximum value of $f(x)$; (b) find the maximum of $f(x)$. I was told by someone that "value" is unnecessary. Moreover, Are (c) and (d) the same? (c) Find the local maxima of $f(x)$; (d) find the local maximum values of…
Haoran Chen
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Why not number some definitions in Rudin's book?

I'm reading Rudin's Principle of Math Analysis Why some definitions about functions in Chapter 8, there are no the number marks, and the boldfaced words Definition? This chapter only have 22 marked theorem and definitions and... For example Section…
HyperGroups
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Name for a basic equation where $x$ appears only once. (E.g. after collecting terms)

I'm a high school maths teacher. I was wondering if there is a name for all equations where a variable appears only once e.g. $$\frac{(x+3)^2}{4}=5\qquad {\rm{or}} \qquad \frac{1}{2}+x=\frac{3}{4}$$ I was planning on introducing the "onion method"…
Ben Crossley
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What are differences and the examples of syntactic knowlede and substantive knowledge in mathematics?

I am sorry if the question is not quite related to post in this forum. There is a distinction between substantive and syntactic knowledge particularly in mathematics. There are several definitions for both knowledge. However, what are the indicators…
wawar05
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How is it that the equality between units and the proportional relations are inverse of each other?

This is a question of basic maths. And I am sorry if this is a stupid question, but I am teaching it and there is something I remember seeing once and ignoring it when I was a child. I understand it is a consequence of a bad procedure in the use of…
Curious student
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How to let a reader know that the meaning of a symbol ($N$) depends upon context (as a vector dimension or as a Noise variable)

There is a conflict of use for one mathematical symbol in my technical document that is defining two different quantities. Due to time constraint I can not edit the document now. What are the possible ways to let the reader of my document know that…
kaka
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So I have a question. I got a number in 6*1*8 where the total number has to be divisible with 9 and not 8. How do I find * (the two unknown digits)?

I kinda know the answer from just guessing and trying to input different numbers but I probably should use something like divisibility rule of 3 or 9 or something but I struggle. Answer I got: 60 138, 62 118, 63 108, 63 198, 64 188, 65 178, 67…
BlackAra99
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Basic Textbook Ratio Problem is Answer Key Wrong?

I am helping my son with his math homework. Neither of us can make sense of this problem but we can solve all the others in the chapter. Is the answer key wrong? The winning pitcher faced 32 batters during the game. If the opposing team had only 9…
GPGVM
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About Editing Math Videos for Teaching

Given the situation we are in (pandemic) I have looked for the best way to make math videos for teaching. I have tried with digital whiteboards, notes in LaTeX but they do not convince me at all. Browsing YouTube I found this channel that is…
Rdch
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How can 1+1=3 be possible?

I've been looking at some proofs but none make any sense to me, can someone prove this is true? One of them... Suppose $a=b$ $$ \Rightarrow a=b $$ Multiply each side by $b$ $$ \Rightarrow ab=b^2 $$ Subtract a^2 from each side $$ \Rightarrow…
Isaac750
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What area of mathematics would this kind of question fall under?

To be clear, I do not need a solution. I also do not have the wording correct as this is from a Japanese math workbook. What area of Mathematics would you place this under? (I want to find workbooks in English with similar questions): "There are 3…
thicksandwich
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