Solve simultaneous equations using the elimination method.
The steps are as follows:
The Elimination Method
Step 1: Multiply each equation by a number so that the two equations have the same coefficient for a selected variable.
Step 2: Subtract the second equation from the first.
Step 3: Solve this new equation to get the value of your first variable.
Step 4: Substitute into either Equation 1 or Equation 2 above and solve for the second variable.


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Percentage discounts?
How would you usually work them out?
Work out a percentage of an amount, then take it off the initial amount- meanwhile the person at the checkout where that item is on sale is giving you the stink eye...
This percentage discount trick is easier than all that! Check it out and you will see for yourself!

Percentage of amounts trick: https://youtu.be/UDa3kRxCNak

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What is the probability of two events occurring together? First determine if the events and independent or dependant on eachother. Does replacement occur? Do you need product or addition rules? All this answered in this probability 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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Subtracting fractions with different denominators instantly using this fast math trick! No working out common denominators - just direct subtraction! Become a math genius in no time!


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#subtractfractions
#fractionsubtract
#fraction
#fractionsmath

Solve simultaneous equations much faster than using the elimination method or substitution.
In fact your teacher won't be able to solve them as fast!

So hahaha to them and more free time for you!

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

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Mentally Convert Fractions to Percentages sometimes.....not always possible!

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#fastmathtricks
#mentalmath
#mathtrick


#fractions
#fraction
#fractionsmath

Time and work questions are easy - just follow this easy math trick.

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Forget finding common denominators when subtracting dissimilar fractions - this way is much faster and easier. This video also looks at how to deal with mixed numbers and simplification. Oh yeah..and at the end can you beat me? Not a chance!

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Dividing Fractions

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#fractions
#fraction
#fractionsmath

Fractions are parts of numbers. In this introduction to fractions we look at the parts of a fraction - the numerator and the denominator, as well as proper fractions, improper fractions and mixed numbers and how these relate to each other.

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#fractions
#fraction
#fractionsmath

Linear equations are easy to work out using a little trick of y = mx + b. Work out the gradient (easy) then substitute x y values to finalise the equation (really easy).

Linear equations playlist here : https://www.youtube.com/playli....st?list=PLjbxBzUM6SL 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 is the EASIEST way to multiply ANY two numbers - even the really big ones!


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The twelve times table trick fast and easy to apply - and it will leave you able to multiply any number by twelve rapidly!
It is similar to an eleven times table trick we have looked at earlier - https://www.youtube.com/watch?v=_HrHUUWtsbE
Just follow these simple rules - for the number being multiplied, double each number in turn and add its neighbour (to the right). Some carrying may be involved but it is easy to handle. This math trick will amaze you!
When you try these out for yourself, write the figures spaced apart, and as you go through answering the question place each part of the answer directly below the digit the answer was derived from. This will help you avoid errors when getting the answer.
In this particualr case of multiplication it is important because you need to easily be able to identify the 'number' and the 'neighbour'.
This method works for all multiplication of twelve. It is not meant as a substitute for knowing your times table, rather, it is meant to allow you to expand your mathematical capabilities and to recognise patterns. 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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Simplifying fractions makes them more simple to deal with. Simple. Easy to do to.

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#fractions
#fraction
#fractionsmath

Work out fractions of an unknown amount with this fast math lesson. This lesson explains the role of the denominator and numerator (bottom and top numbers) in a fraction to show how to solve these types of math problems quickly and easily. 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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Convert from miles to kilometres instantly, and the back again! Or...convert from kilometres to miles. This method is a fast way to do the multiplication required!


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#convertingmeasurements
#convertingunits
#metric

How to you convert between improper fractions and mixed numbers? Or mixed numbers and improper fractions. This video looks at this.

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#fractions
#fraction
#fractionsmath

This trick allows you to work out the cube root of any number fairly quickly, - and what's more it is easy to learn and remember!
You'll be doing vube roots in your hear - faster than a calcuator.

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Decimal playlist...click here!
https://www.youtube.com/playli....st?list=PLjbxBzUM6SL

Dividing decimals is easy, just divide like usual - and work out the number of decimal places as follows:

The number of decimal places in the answer = number of decimal places in the item being divided - number of decimal places in the dividing number....

e.g. 123.963 (3) / 0.3 (1) = 413.21 (3 - 1 = 2) where decimal places are shown in brackets.

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




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