Tree diagrams are used help work out outcomes when doing probability calcuations.




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Prime factorization and factor trees.
Every composite number can be written as a product of powers of prime numbers.
A factor tree shows the prime factors of a composite number.

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

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This long division trick is a simple as connecting the dots, and it's as quick as a flash.
Math is math with tecmath math!

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Rule of 72. This method lets you compound interest calculations in your head to find an the time taken for an investment to double. 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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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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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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This algebra trick allows you to easily solve where the variable (that letter x) occurs on either side of the equation. In just a few seconds. Snap!

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Finding the square of a nmuber is easy - just follow these mental math tricks. You'll be able to calculate squares faster than ever and amaze everyone with your utter genius!

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#fastmathtricks
#mentalmath
#mathtrick

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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Square numbers are numbers multiplies by themselves. These are written to the power of two.
The opposite of square numbers and square roots.

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

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How to solve Simultaneous Equations by Elimination.

For more examples of how to solve simultaneous equations using the elimination method go here: https://www.youtube.com/playli....st?list=PLjbxBzUM6SL

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To look at the decimals playlist go to:
https://www.youtube.com/playli....st?list=PLjbxBzUM6SL

Subtracting decimals is fast and easy - just remember to line up place values and the decimal points. With this easy math lesson you can soon be able to subtract decimals without a problem. 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 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

#fastmathtricks
#mentalmath
#mathtrick Using algebra it can be proven that 2=1.
Use this math trick to fool your teacher, trick your friends or possibly end the universe.
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The Order of operations is the order in which you should do a maths equations. You've probably heard it called BODMAS or PEDMAS...even BIDMAS or PIDMAS....it's all the same thing!
First do anything in brackets (also called parenthesis). Second, do any orders (these are squared, cubed, square root and the like). Any multiplication or divide come next, and finally do any addition or subtraction...left to right. 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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Division of Fractions is easy - the trick is to know that you must invert (flip) the divisor (number being divided) - then multiply the fraction out. You will soon be able to divide any fraction with this fast math lesson.

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Casting out nines is a fast and easy method of making sure your math division calculations are correct. This trick is fast, easy, and accurate! 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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Coronavirus is here. The numbers are terrifying.
The number of cases worldwide doubles every four days.
We'll be at a million cases within two weeks.
The fatality rate of coronavirus is from 1 to 3.4% It requires hospitalisation in 19% of cases.
And we fiddle whilst Rome burns. To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU
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Multiplying Decimals is easy
To multiply decimals, first multiply as if there is no decimal. Next, count the number of digits after the decimal in each factor. Finally, put the same number of digits behind the decimal in the product.
#decimals #decimalmultiplication #howtomultiplydecimals


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The least common multiple (aka the lowest common multiplier LCM) is easy to work out - just use this simple method. Is this the fastest way? Like many things in math that depends on the problem being solved!
This video lesson looks at solving the LCM for less complex 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
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