Math Teacher Shows TOP 10 MISTAKES students make

Year after year high school MATH students are making the same main mistakes. Watch carefully so you don't make these mistakes any more.

0:00 - Intro
0:14 - Mistake 10
1:34 - Mistake 9
2:57 - Mistake 8
5:10 - Mistake 7
6:36 - Mistake 6
8:42 - Mistake 5
11:13 - Mistake 4
12:46 - Mistake 3
15:12 - Mistake 2
16:10 - Mistake 1
18:14 - Quiz

[bungercolumbus]

Not gonna lie. As a dude in the 12th grade. These are the mistakes someone who just memorizes math, instead of understanding it, would do.

[LukeInAK]

I don't think you realize how life changing this was, literally covered almost every misunderstandings of algebra that I ever had. Seriously dude, thank you.

[CreatorProductionsOriginal]

There’s two type of reactions while watching this
** 10^10 levels of pain as you watch the mistake**
“Oh, that’s how you do it”

[davidthblank]

I swear math is the worst taught subject in the world. Most of us never properly learned or weren't even taught some of these basic principles.

[MAZINO]

I had physical pain watching the students solve.

[otakuhaven-]

As an Indian and a weak student in maths I'm proud to say that I don't make 90% of these mistakes

[monojoy]

I am in Grade 9. This video cleared all my doubts. Thanks for the help.

[pop]

for the last tip you can remember that (a+b)^2 = a^2 + b^2 + 2ab, so you dont have to actually multiply it out every time

[marciomarquesdarocha]

Hi!

I'm a Math teacher from Brazil and my students make same mistakes here! Unbelievable 😮

[Bubs.]

Finishing up my math classes for my engineering degree- I was curious if I’d see any mistakes im not aware of but I’m comfy with all these and have definitely made pretty much all of these mistakes at one point. Makes me feel like I’ve learned it properly though!

[bishalacharya]

Being an Asian I can't relate to this video. I never made these mistakes

[innocentinnox]

I did some of these mistakes in my first year A-LEVEL mathmatics, I really had to do alot of practice to get rid of them, Thank God in my final highschool year I was so proficient and never did such mistakes. You really need alot of practice to master algebra.

[shampadutta]

• Reference: 15:30

Here, with Error #2, I'd like to add a point:

Mostly, when students see the square root function, they instinctively think of 2 solutions, +ve and -ve. But that isn't the case in some places.

• Example

Imagine the question √9 = ?

Most students answer ±3, which is wrong. The answer is only +3.

The square root function by itself denotes the absolute value only.

But, there's a catch! Suppose the question is –

If x² = 9, find x.

Then x can assume 2 values +3, -3.

The thing is, when we're just asked what the square root of a number is, then the answer is only the absolute value.

However, when asked the square of what number can assume a given value, then the answer will be both ghe positive and the negative values of the square root.

[syaff]

I love the sound editing on this its so funny, also the way you were correcting and teaching was also clear and concise. The editing kept me entertain while watching

[BKKGarrett]

The way I explain Number 2 to students is that you can ONLY cancel terms that are multiplied to the entire numerator and entire denominator. In the numerator of your example, the 2 is only multiplied to the x, not the rest of the numerator, so you can't cancel it with anything in the denominator

[ajinkyakale]

brooo!!!???
whatt!??
only watched till the first mistake and my mind is already expanding in all directions smt crazy good thanks brother

[floweryfelix]

I'm in seventh grade.
And for the sixth one…… Damn bro how do students even think like that

[opposedscroll]

10:30 i used another method to get this answer:
3/x = 6, that means that x/3 = 1/6, multiplying both sides by 3 we get the answer of x = 3/6 which can be shortened further to x = 1/2

[user]

1. True
2. Its x² + y² + z² +2(xy + yz + zx)
3. 4 × 2^x
4. True
5. 1 + (x/y)
6. 17/4
7. Right
8. Cos(x-y) = cos x cos y + sin x sin y

[greencrown]

As a middle schooler, our math teachers taught us how to stop making the mistakes, except mistake 4 because we haven't done functions yet