This trick allows you to work out the surface area almost instantly of ANY rectangular prism (or box). How do you work out the TSA (total surface area) of a box - watch this video and you'll be able to do it instantly!

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This maths calculation tricks helps you quickly work out hard to divide numbers, such as those with long division. With no effort you will be doing long division with 9, leading on to doing long division with any number under 100 in future (linked) videos.
This would have to be the most easy long division trick.
See my other videos for how to divide the normal way, and how to divide fractions and decimals.

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When rates are expressed as a quantity of 1, such as 2 feet per second or 5 km per hour, they are called unit rates. Use this trick to always get them right! To support free math on Patreon (thank you): https://www.patreon.com/tecmath 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
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This algebra math video tutorial focuses on simplifying exponents (also called indicies) using the five exponent laws.
What's more we look at WHY the laws work - so you will remember them!
Plenty of examples.

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Invest in yourself! Use my link and check out the first chapter of any course for FREE! https://bit.ly/2LNGEQ4

This video was sponsored by DataCamp.

Autobiographical Numbers - the numbers that describe themselves.

Five digit example 21,200
The first digit describes how many zeros are in the number.
The second digit, how many ones there are in the number.
The third digit, how many twos there are, and so on...
Can you work out the only ten digit autobiographical number?


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#datacamp
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It is easy to convert work out the area of rectangles and triangles. Just follow the steps in another fascinating math lesson. 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
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More quadratic eqautions through completing the square.
Need the first video? https://www.youtube.com/watch?v=d2LMCiIGnXA

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This math problem went viral after being posted in 2020.
Celeste Ng tweeted 'At dinner, nine year old made up a math problem and made his father and me solve it. Our attempt at simultaneous equations got really complicated. We figured it out via guess and check, but I still think there has to be a more elegant way.'
Can you solve the nine year old math problem using both guess and check and the elegant way - using algebra?

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#mathproblems
#mathriddles
#mathsforfun

Factor trees can be used to work out the Greatest Common Factor - which is also called the greatest common divisor, or the highest common factor.

For the playlist of indicies and prime numbers.
https://www.youtube.com/playli....st?list=PLjbxBzUM6SL

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The trick to getting the right answer with volume calculations every time. Be a math genius with mental 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
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What are Ratios?
How do I write two numbers as a ratio?
How to simplify ratios.

All here.

How are your adding fraction skills? Can you win this challenge?

This video is part of a playlist:
https://www.youtube.com/playli....st?list=PLjbxBzUM6SL

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#fractions
#fraction
#fractionsmath

Ratios are said to be in proportion if they equal. This video looks at how to simply see if two ratios are in proportion - that is whether they are equivalent. We then look at how to easily find out how much of a quantity is required to keep something in proportion. To support free math on Patreon (thank you): https://www.patreon.com/tecmath

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Ratios, rates, percentages, currency conversion, speed...all easy and accurately done.

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we are geelong the greatest team of all
we are geelong we're always on the ball 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
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This amazing math trick can be used to multiply two digit numbers instantly.
It is important to remember that for this particular multiplcation trick that it is just that - it is very specific and has a few conditions which must be met in order for it to work. First the first numbers must add up to ten, and secondly the last numbers must be the same....so very limited, but cool nonetheless!

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This is the fastest way to convert kilograms (kg) to pounds (lb), and then in trun to convert pounds to kilograms.
In this video we will look at how many pounds in a kilogram, and using this idea we will use a fast math trick to convert between the two.

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#convertingmeasurements
#convertingunits
#metric

How to do ratios: a basic introduction.
How to set out ratios.
How to simplify ratios.
How to divide up into ratios.

To support tecmath on Patreon: https://www.patreon.com/tecmath
It really helps and is appreciated!

This problem solving question involves rectangles, rectangles, rectangles...so you should find it easy...maybe? To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU
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#mathproblems
#mathriddles
#mathsforfun

Converting between mixed numbers and improper fractions is really easy. 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
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