As per usual, I’m amazed that we are not taught this method in school. Your channel is such a great resource. I’m learning so much. Thanks very much!

I wish you were my math teacher when I was still in school...

@tecmath

3 жыл бұрын

Thanks

@wencvr

3 жыл бұрын

I love your videos.

@kd3271

3 жыл бұрын

he is my math teacher

@Tr1f4ct

2 жыл бұрын

@@tecmath same I love your vids

I used to be scared of figures and watching this method is bringing a smile to my face again! 😁

knew this one tec, great refresher for those who forgot, amazing technique

I am incredibly grateful for your work. I watch it for fun now, math is so cool.

Your tricks are pure awesome and fun Plus your voice make them more exciting

This is helping me so much in many ways. I love your soft and kind voice. It helps to learn easy and better. I'm gonna try for other numbers now. Thank you Sir ❤️

Thanks so much for this. You explain it beautifully and its actually good fun!

i swear your channel is a life saver i have loads of test coming up soon and this rlly helps😩

I wish I knew you in my school time. You are a great teacher sir , respect!

So stoked that what I’m already doing is finally endorsed!! 👍🏽🇦🇺

Great approach

Brilliant explanation! Thank you so much. 👍

I have loved your videos ever since I was in high school.

Thank you, I find your channel amusing 😃👍

Thank you, this helped me so much!😀

Great explanation/demo...👍

You are awesome. Thanks for another great technique 🙏

Awesome video thanks for making calculations faster for me!

Pure Perfection!

I also noticed that when you do a percentage of a two digit number ending in 0 like the first two examples, it's the tens place times the percentage number then move the decimal point one space left in the answer: 13 x 4 = 52, make it 5.2.

@LoudMinded

3 жыл бұрын

It's the similar for those that don't end in 0 as well, 32 times 75 = 2400, 2400/100 is 24

@deven2636

3 жыл бұрын

@@LoudMinded if that’s the case, move the decimal.

I found it easier to do “40% of 13” instead. Which is 10% of 13 (1.3) times four = 5.2. You mentioned this briefly with 32% of 75, but I think it deserves a mention. Always try to find the easier percent - generally the one that’s divisible by numbers like 5/10/25/etc :)

Nice work !!

You made maths more interesting by order of magnitude. Hats off! ❤️

It's also useful to understand that A% of B is exactly the same as B% of A. This sometimes allows for quick mental calculations. Thus, 17% of 30 is the same as 30% of 17, or .3 thimes 17 = 5.1

Very cool, thanks!

Amazing video!!!!

I'm happy at my age to find some help with my percentages. I need more examples with your answers! It's amazing how I am disabled with solving match equations.

Thank you 😊

You are a legend!

Great. Thank you

great video. thank you

Love it!

Thank you!

This is a great trick for percentage calculations. 👍🏼

Loved it 👍

This type of trick is also there for division of imperfect numbers I will show Lets say 15 ÷ 4 Now make different parts of number 4 as follows: 1 part of 4 = 4 2 parts of 4 = 8 3 parts of 4 = 12 Now the closest 1 we have is 3 parts = 12 To get to 15 we need 3 more than 12 which means that we do not need a full part of 4 So we will take 3 parts out of the number 4 which means we need 3/4 more than 12 So we got 3 parts of 4 = 12 and 3/4 parts of 4 So ( 3 + 3/4 ) × 4 = 15 Easy ☺

@-The-Golden-God-

3 жыл бұрын

👀

@cmdrgrover_stw5488

3 жыл бұрын

Sorry mate your lost me at imperfect numbers

your a legend mate

This what I should see in recommends!!!

Math teacher: just use my method!! you'll fail!!! techmath: no, no I don't think I will

I got them all, my friend🤗💚

If you are good with multiplication then you just multiple and count the decimal points using the trailing zeroes.

I forced myself to learn a different way (MOSTLY self taught) which is not unlike your method, I really do like this, it is smooth. Basically it was to flop the numbers around until you had something to work with that was closer to 10. Such as 31% of 70, you could easily flop it around to 70% of thirty one. Sometimes I did the tenth like you. If I would have seen this video when I was 6 yo, it would have saved me many an angry night.

Thank you sir

no wonder you have over 1M subscriber, thanks a lot

An even easier way: 13 x 4 is: 52. Add decimal and you’re there. 5.2.

Thank you for giving me the confidence to try this and get it right. Normally I would reach for a calculator. 🍎

This video has made me realise that I don't understand maths at all lol

“Nice n easy” “Not so difficult was it?” Great series

When are you going to set up your virtual courses?

That was easier than school! RIGHTEOUS!

can you make a video about the trachtenberg system?

Thanks

This chap digs alright 👍

tysm brooo

I got my Calculator right beside me. Piece of cake doing these.

you have a good deep voice

Love your videos mate. gudonyah

This is genius! Why wasn't I taught this in school?!

I use the rainbow multiplication on percentages and it works too , it’s actually pretty fast

@samnation9887

Жыл бұрын

1x4 1x0 3x4

Hi bud, I am wondering if you could show the calculation(s) of these type of problems using multiplication? Or, do you have another video showing this? Cheers :-)

I got 56% of 420 wrong because I miscalculated, but your calculation is really simple. I may have to start using your method.

I was too focused on this trick i forgot the swap method

This is insanely smart

Brilliant. I watched only the first 28 seconds to learn the trick... Multiply two numbers and divide by 100, right?

HOW DID THEY NOT TEACH ME THIS BACK IN GRADE SCHOOL?!? HATED PERCENTAGES! :(

This is how I’d do it for a more difficult problem (such as 22% of 52) but for a problem like this (13% of 40) I’d switch the percentage number (A% of B=B% of A, or for this problem, 13% of 40=40% of 13) then do this method (1.3x4=5.2)

How about 13 x40 =520, divided by 100 (for the percentage thingy) =5.2

Additional good good trick is that you can take away parts too. So if you need 9% then it is easy to work out 10% and 1% as shown and take the 1% off the 10%.

I use this strategy when I need to calculate in my head. I teach high math and most of my students struggle with percentages. 😔 I'm not sure when the disconnect happens, but I always do a mini lesson when I know I have a lesson covering percentages. 😉

100%=40 10%=4 1%=0,4 So 5,2 BTW i found this way myself i actually try find easy ways my self.

@tecmath

3 жыл бұрын

Great work. Most 'tricks' are just observations and thinking about things a tiny bit differently. Love that you do that!

I turned it around and figured 10% of 13 and multiplied that by 4.

5.2. 10%x40= 4; 1%=.4. 4+3x0.4= 4+1.2= 5.2. Learned how to do this in Primary School in the 60s.

How about cm to inches.

"Hey Google! What's 13 percent of 40?"

I'm autistic diagnosed late in life. I loved sciences but my poor math skills kept me from pursuing them. Had there been the push as there is now in the US to get girls into the sciences and had they known about autism they would have gotten me a tutor to make up my math deficits and I would have been a researcher of some kind but alas, no. Had math been taught the way you do I wouldn't even have needed a tutor. Thank you for sharing your great work.

I still remember the I owe you 100 dollars. It basically also helped with word problems with percentages. Yes I see where you are coming from, and I do this in my head already. But if you sit there and try to teach me new math, I will just glare at you and walk away. Just like I still do the old chants in my church upbringing, even though I do not go to church today. Autistic, and I hate change.

I thought a method that is multiply the number by the percentage and remove zeros until you think that is the result, for example 60% of 120, 60x120 = 7200 so i remove the 2 zeros and the result is 72, this method i use it for calculate an approximate of a discount in markets and stores when only says the percentage off

To get 1% of 40, divide 40/100 = 0.4 Then multiply 0.4*13 = 5.2

but how else would you work this out? i thought this was the normal way

love it. Although I wish he would keep the numbers aligned to the decimal place …..

What is 10% of 51 ? please

I still can't get it 😪

Teachers can be interesting and clever when you meet the right ones eh. I went from F grade chemistry to A grade in one year because of a teacher change.

"of" means "times" so just do that and move the point 2 places to the left.

Please make video on mensuration formulas please i have an exam sir please help me

Thanks for all your help but i have a faster way

@tecmath

3 жыл бұрын

Calculator? Alexa? Straight multiplication (you can use this - but for some reason some people find that harder!)

@Commentify69

3 жыл бұрын

@@tecmath no i acctualy do it myself well i dont use calculators and things i just like school more than the average percentage.

@DaleDix

3 жыл бұрын

There's always someone.....

13% of 40 = = (40*13)/100 40*10+40*3 = 400+120 = 520 520/100 = 5.2

5.2

👍👍👍

5,2

Or just multiply 40X13 and move the decimal over 2 to the left.

Just do 13 x 4 and move the decimal

Wow! just because we know this or other ways doesn't mean others can't learn just wow......

🤯

You belong teaching teachers who teach teachers. Too many people have math issues. Some are now calling Math racist.

As a mathematics professor this way is difficult

Oh my god just multiply the two numbers and move the decimal point two spaces and you are done.

I just multiply and always get it right

@tecmath can you show us how to solve 6 ➗ 0.0003 please 🥺🥺🥺