In this video we look at the basics of algebra, focusing on the notation that is used.
In algebra we use symbols to represent numbers. These symbols are called variables. Some reasons for using symbols instead of numbers is that the symbols, or variables, can represent unknown quantities and for showing formulae like the area of a circle.
Instead of writing a X b we remove the multiplication sign and just write ab instead. Two letters next to each other or a number and a letter, means those things are multiplied together.
We use a curly x for the letter because otherwise it looks like a multiplication sign.
Instead of the division sign, in algebra we usually write it as a fraction. Numbers are usually left as fractions rather than as decimals.
Our teachers and animators come together to make fun & easy-to-understand videos in Chemistry, Biology, Physics, Maths & ICT.
VISIT us at www.fuseschool.org, where all of our videos are carefully organised into topics and specific orders, and to see what else we have on offer. Comment, like and share with other learners. You can both ask and answer questions, and teachers will get back to you.
These videos can be used in a flipped classroom model or as a revision aid.
Twitter: https://twitter.com/fuseSchool
Access a deeper Learning Experience in the FuseSchool platform and app: www.fuseschool.org
Friend us: http://www.facebook.com/fuseschool
This Open Educational Resource is free of charge, under a Creative Commons License: Attribution-NonCommercial CC BY-NC ( View License Deed: http://creativecommons.org/licenses/by-nc/4.0/ ). You are allowed to download the video for nonprofit, educational use. If you would like to modify the video, please contact us: info@fuseschool.org
Click here to see more videos: https://alugha.com/FuseSchool

The study of finches led to the development of one of the most important scientific theories of all time.
In December 1831 a naturalist called Charles Darwin boarded the HMS Beagle, bound on a surveying voyage of South America. Whilst the ship and crew carried out coastline surveys, Darwin was fre

Learn the basics about halogenation within the alkanes and alkenes part of organic chemistry.
Our teachers and animators come together to make fun & easy-to-understand videos in Chemistry, Biology, Physics, Maths & ICT.
JOIN our platform at www.fuseschool.org
This video is part of 'Chemistry for

The Mean | Statistics & Probability
Bob is training for a race and is timing himself to check he’s getting faster.
Times (in minutes):
51 48 45 44 47
50 44 47 45 43
49 44 43 44
His times are a bit inconsistent.
He wants to find his average, to get a better understanding of what time he is likel