Same tens digit? Instantly multiply them

This trick is a great one.
It uses an amalgamation of other mental math techniques - and will have you smashing those calculations.
Here is THE mental multiplication lesson playlist - progressing you through your mental multiplication.
• Tecmath's mental multi...
Here is that link how to multiply questions like 49 x 40 instantly
• Can you do this type o...
The rest are links where I beg for money.
To donate to the tecmath channel:paypal.me/tecmath
To support tecmath on Patreon: / tecmath
To buy tecmath mechandise: teespring.com/...

[@SpaceWithSam]

Extremely educational and fun to watch! Thank You!

[@jdmack1]

Great technique, keep up the good work mate.

[@ranjeettiwari2011]

Your all videos make a great sense to every individual 😊😊 keep making these kind of videos to aware people that maths have something interested in it

[@luzleal-esqueda5144]

Talk to me math. Gm! Love this!!!!

[@AliKhanMaths]

Wow, another amazing mental math trick! You've really inspired me to share my maths tricks as well

[@sukritijha7067]

These are really fun tricks I use the square root finding trick and the squaring technique the most! Thanks a lot!

[@Shaq34332]

I wish you were around when I was in school. But I still love math.

[@parmanyugodara6751]

Well that's a good trick to learn
Thanks Josh 🥰🥰🥰

[@ShuchitaClasses]

शिक्षा की जड़ें कडवी हैं, लेकिन फल मीठा है।🌻🌻🌻🌻🌻🌻🌻🌻🌻🌻🌻🌻🌻🌻🌻🌻🌻🌻🌻🌻🌻🌻🌻🌻

[@kellyh9572]

I wish you could do my maths exam for me 😂

[@WARTHOG_BRRT]

Always did cross multiply in my head

[@brianwild4640]

Please post a link to the 40x fast trick as the link does not work on all devices. In a comment pinned will be great

[@meantforterrorfilledleisure]

Hey u should come up with a new division trick tha helps us to divide any huge no by any 3/4 digit no in whick we could also find the ans upto infinite figures easily

[@tamerhegab1513]

Great

[@sanika.songbird]

What if it has decimals?

[@tardis4125]

Is there a faster way of multiplying something like 2543×42. They're too far apart for this method. Normally i would multiply 2 by all the numbers in 2543, then 40, and add them. But is there a faster way kinda like in this video?

[@AP-qs2zf]

your link is wrong video

[@abiodunaghedo550]

One of the rate times where he crossed his 7! 🥺😧

[@rakshakkhatri6445]

Noice new trick

[@faramund9865]

Idk this isn't much faster than doing the regular double digit stuff you taught.

[@matthewklan]

Where's the link ya turkey?

[@tecmath]

Well said. I'll check!

[@justintranthegreat]

@@tecmath Hey tec math, please please get this message. Could you please tell me how to multiply 2 digit by 4 digit numbers using the same method, I dont know the pattern. I know how to do 2 digit by 2 digit easily using this method tho. Thank you

[@Bibouu.bb23]

Am I the only one who get the last one with another way I don't know if you used it before but I found the same answer using another way 😐😕

[@sharonjuniorchess]

There are a number of different ways you can do these so you can use one method to check your answer to another.

[@Bibouu.bb23]

@@sharonjuniorchess actually I used the way you used with the previous number with the same tens digit and it works

[@Bibouu.bb23]

@@sharonjuniorchess but thank you for the trick 😊

[@AP-qs2zf]

No you did not explain what 49X40 in the last video. Learn to edit your videos if its wrong.

[@wnJhntn]

Face reveal pls

[@AP-qs2zf]

your previous video(link above) did not show how to multiply 49x40 in your head. what is wrong with you? too lazy to edit?