Simultaneous equations are where we work with two algebreic equations to solve unknowm variables.

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The Law of Sines (also known as the Sine Rule) is a method for working out the angle or side length in a non right angled triangle.
Trigonometry lessons from the mathiest math channel - the tecmath channel!

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An easy intro to prime numbers and composite numbers that MAKES SENSE.

What are prime numbers?
A prime number is a number that has exactly 2 factors: two and itself.

What are composite numbers?
A composite number is one which has two or more factors.

What is the difference between a prime number and a composite number.....?

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How can you multiply in your head? Mental maths is easy - using this trick to reprogram your brain to multiply quickly and easily. This lesson shows you tips on how to multiply faster than ever!

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In this math lesson we explore how to increase or decrease an amount by a given percentage - through simple multiplication.
The method for doing this type of percentage problem is as follows, where we find 35 increased by 20%.
First we start with the whole amount - in this case 35. Percentages describe a number expressed as a fraction of 100, so as 35 is the whole amount it is 100% or 100/100 or 1. To take off 20% we are taking off 20/100 or 0.2 of this - so 1 - 0.2 = 0.8.
0.8 of 35 is the same as 0.8 x 35 = 28.0.

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This looks at how to do simple subtraction in maths.
No tricks, no fuss.
This is one of the most basic things in maths - yet as a senior level maths teacher I am astounded how many people lack this ability - and as such they struggle throughout their school years at maths.
Addition, subtraction, division and multiplication - these are the most important thing anyone should know in maths , yet a large number of people who still are yet to attain this skill!
Practice this lesson!

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How Many Faces, Edges And Vertices Does A Cylinder Have?
Here we’ll look at how to work out the faces, edges and vertices of a cylinder.
We’ll start by counting the faces, these are the flat surfaces that make the cylinder. A cylinder has 2 faces altogether - 2 circular faces, as well as 1 rectangular face.
Next we’ll work out how many edges the cylinder has, which are where two faces meet. A cylinder has 2 edges.
Next we’ll count the corners of the cylinder (the corners). No surprises, a cylinder does not have any vertices.

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#fastmathtricks
#mentalmath
#mathtrick The easy way how to multiply numbers under twenty - faster than a calculator!
Become a math genius the smart way - using vedic math - not the way you've been taught! To support free math by tecmath on Patreon (thankyou): https://www.patreon.com/tecmath

Vedic Maths is series of mathematical tricks, originating in a book written by an Indian monk Swami Bharati Krishna Tirtha in 1965. It contained a list of mental calculation techniques which were claimed to be retrieved from the Vedas - are a large body of religious texts originating in ancient India.
Please if you are learning this, however, do not treat multiplication as a mere trick. It is important to remember 17 x 13 for example, is the repeated adding of 17, 13 times (17 + 17 + 17 + 17...).
This method is a shortcut, but as the end proof shows, it is using a shuffling of required calculations to make this multiplication more efficient.
For 17 x 13, we have lots of multiplication going on (that is repeated addition!) - 10 x 10 and 3 x 10 and 7 x 10 (lots of 10s - 20 all up) - and 7 x 3.

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Probability in math measures the likelihood of an event occurring. In this video we look at basic probability, and the probability formula. 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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The quadratic equation can easily used to solve quadratic equations.


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Permutations are easy to understand...but take time to get to why we work them out the way we do so you can understand them better. This video also looks at how permutations differ from combinations, and well as looking at simple permutations, permutations with limited spaces, permutations with repeats, and permutations in a circle.
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Multiplying Fractions


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

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#fractions
#fraction
#fractionsmath

#fastmathtricks
#mentalmath
#mathtrick Dividing fractions quickly is easy with the butterfly math trick! 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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I don't want to go clickbaity, but I think only about 2% of people will be able to solve this...the rest will give up! Good luck.

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#mathproblems
#mathriddles
#mathsforfun

This shortcut is used to solve algebraic equations instantly, without all the messy working out!
Best of all, this trick is easy to learn, so you'll be able to solve problems quicker in no time at all.
Learn better. Learn faster. Learn smarter.

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Linear equations are equations between two variables that gives a straight line when plotted on a graph. For example y = 2x + 1 is a linear equation - and as we will see it goes up by a regular amount and when we graph it it will be expressed as a straight line.
We will also look at how to easily recognise a linear equation and a non linear equation, through the use of three simple observations that can be made about the equation.
An easy quick math lesson for you.


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How to calculate square metres of a shape in really important to get the right measurements be when ordering materials. To make sure you’re measuring square metres correctly, we'll work out the area of a rectangle with three examples. This lesson also looks at some of the conversions that might need to be made when calculating area in square metres and square centimetres.

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Medication Calculations for nurses and all medical types.....in this video we look at concentration percentages. 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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There is no trick to doing surface area quickly, but there is to getting the right answer every time. Be a math genius with mental math.

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This is the easiest way to learn your times tables from 10 to 20 is to use this shortcut.
What's more there is an easy visual explanation WHY this works!
On beyond Zebra!


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