Casting out nines is a fast and easy method of making sure your math multiplication calculations are correct. This trick involves adding the digits of each number and reducing each to a single digit, then comparing the end result with the answer. To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU
To support tecmath on Patreon: https://www.patreon.com/tecmath
To buy tecmath mechandise: https://teespring.com/stores/tecmath-store

To support free math by tecmath on Patreon: https://www.patreon.com/tecmath
To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU

In this video we look at how to multiply any two digit number by eleven instantly - much faster than any calculator! Multiplication has never been so fast and easy with this Vedic Maths Trick! Fast Mental Math Tricks and times tables - you've got to love them! In addition, we'll look why this trick works, as well as tips to do it mentally. To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU
To support tecmath on Patreon: https://www.patreon.com/tecmath
To buy tecmath mechandise: https://teespring.com/stores/tecmath-store

Calculating the tip is not hard. Just use these basic mental percentage strategies and you'll be all good.
And yes. We generally don't tip in Australia! But in some countries it's how wages are paid - and I reckon if that's the case you've gotta pay people fairly for thier job!

To tip the tecmath channel:https://paypal.me/tecmath

To support tecmath on Patreon: https://www.patreon.com/tecmath

To buy tecmath mechandise: https://teespring.com/stores/tecmath-store

Forget finding common denominators when adding dissimilar fractions - this way is much faster and easier. This video also looks at how to deal with mixed numbers and simplification. This cool math trick will have you adding fractions like a genius!

To donate to the tecmath channel:https://paypal.me/tecmath

To support tecmath on Patreon: https://www.patreon.com/tecmath

To buy tecmath mechandise: https://teespring.com/stores/tecmath-store

This cool math trick for multiplication is amazing - you will be solving math with no problem! Multiply numbers instantly without hesitation and amaze everyone with your genius! Become the lord of mathematics!

To donate to the tecmath channel:https://paypal.me/tecmath

To support tecmath on Patreon: https://www.patreon.com/tecmath

To buy tecmath mechandise: https://teespring.com/stores/tecmath-store

This math lesson looks at pythagorean math - how to work out the unknown sides of right angles triangle. The 3,4,5 triangle will also be explored. Become a math genius! To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU
To support tecmath on Patreon: https://www.patreon.com/tecmath
To buy tecmath mechandise: https://teespring.com/stores/tecmath-store

Sequences and series...what are the next numbers in the following pattern?
You'll be fine. Just follow these tips and tricks.

mm, cm, m, km. How to convert between these!

To donate to the tecmath channel:https://paypal.me/tecmath

To support tecmath on Patreon: https://www.patreon.com/tecmath

To buy tecmath mechandise: https://teespring.com/stores/tecmath-store

Learn what is meant by a composite shape and how to find its area.
See how good you are with area of composite shapes - working out the amount of chipboard required for a floor; then working out how many bricks are required for a wall. Thrilling stuff. To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU
To support tecmath on Patreon: https://www.patreon.com/tecmath
To buy tecmath mechandise: https://teespring.com/stores/tecmath-store

It is easy to work out percentages of a number.
In this video we look at the standard way of finding the percent of a number though changing the percentage amount to a fraction out of 100 (this is what a percent really is!), then using the standard formula to find our answer. To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU
To support tecmath on Patreon: https://www.patreon.com/tecmath
To buy tecmath mechandise: https://teespring.com/stores/tecmath-store

This easy visual proof shows that the area of a circle is πr2.


To donate to the tecmath channel:https://paypal.me/tecmath

To support tecmath on Patreon: https://www.patreon.com/tecmath

To buy tecmath mechandise: https://teespring.com/stores/tecmath-store

This multiplication trick seems to have it's origins all over!
It's a great trick which uses groupings of numbers and can be used for any numbers!

To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU

To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU

To support tecmath on Patreon: https://www.patreon.com/tecmath

To buy tecmath mechandise: https://teespring.com/stores/tecmath-store

#mathtrick
#mathstrick
#multiplicationtrick

In the movie Good Will Hunting the MIT Math Professor sets his students a challenge...that took them two years to solve.
Can you solve it? There is a good chance you can!

BTW want to be a true math genius?
Math geniuses always write on glass.


To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU

To support tecmath on Patreon: https://www.patreon.com/tecmath

To buy tecmath mechandise: https://teespring.com/stores/tecmath-store

This trick is for squaring mixed numbers like the one you see in the thumbnail!
Did your teacher teach it to you?

To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU

To support tecmath on Patreon: https://www.patreon.com/tecmath

To buy tecmath mechandise: https://teespring.com/stores/tecmath-store

How to work out body surface area, and dosages based on this for pediatrics. To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU
To support tecmath on Patreon: https://www.patreon.com/tecmath
To buy tecmath mechandise: https://teespring.com/stores/tecmath-store

With this mental math trick you will be able to multiply these numbers in your head rapidly - a critical skill in everyday math. In this video we look at tips on how to do multiplication instantly without using a calculator. Fast math is good math! To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU
To support tecmath on Patreon: https://www.patreon.com/tecmath
To buy tecmath mechandise: https://teespring.com/stores/tecmath-store

How to work out the area of a triangle with three examples. This lesson also looks at the units used such as square metres and square centimetres.

Support the tecmath channel at patreon: https://www.patreon.com/join/tecmath To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU
To support tecmath on Patreon: https://www.patreon.com/tecmath
To buy tecmath mechandise: https://teespring.com/stores/tecmath-store

This math problem doesn't look very hard, but this problem is deceptively tricky...or is it?

To contribute on Patreon:
https://www.patreon.com/tecmath

For the playlist of math problems:
https://www.youtube.com/playli....st?list=PLjbxBzUM6SL To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU
To support tecmath on Patreon: https://www.patreon.com/tecmath
To buy tecmath mechandise: https://teespring.com/stores/tecmath-store

#mathproblems
#mathriddles
#mathsforfun

How to get to the SketchUp self paced tutorials, and use tools such as the measuring tool, move, rotate and how to get exact sizing. To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU
To support tecmath on Patreon: https://www.patreon.com/tecmath
To buy tecmath mechandise: https://teespring.com/stores/tecmath-store

Trigonometry is an easy way to work out the unknown sides and angles of a right angled triangle. The trick - know the side names - the opposite, hypotenuse, and adjacent, and know how and when to apply the trigonomic functions - sin, cos and tan. this is the only trick to getting it right every time!
In this lesson, students learn work out unknown angles using use sine, cosine, and tangent. You will need a scientific calculator for the problems in this lesson - and I'll show you how to access one on your computer. To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU
To support tecmath on Patreon: https://www.patreon.com/tecmath
To buy tecmath mechandise: https://teespring.com/stores/tecmath-store