Getting the most out of DIY Maths
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The number lineOrdering negative numbersNumber oppositesAbsolute valueAdding and subtracting with negative numbersMultiplying with negative numbersDividing with negative numbers
Understanding fractionsSimplifying (reducing) fractionsEquivalent fractionsComparing fractionsOrdering fractionsMixed numbers and improper fractionsAdding fractionsSubtracting fractionsAdding and subtracting mixed numbersMultiplying fractionsDividing fractionsMultiplying and dividing mixed numbersConverting fractions to decimalsConverting fractions to percentsConverting between fractions, decimals and percentsOrdering fractions, decimals and percents
Place valueComparing and ordering decimalsRounding to a placeSignificant figuresStandard form and engineering notationAdding decimalsSubtracting decimalsMultiplying decimalsDividing decimalsConverting decimals to fractionsConverting decimals to percentsConverting between decimals, fractions and percentsOrdering decimals, fractions and percents
Solving percent problemsPercent increase and decreaseConverting percents to fractionsConverting percents to decimalsConverting between percents, fractions and decimalsOrdering percents, fractions and decimals
Metric units of measurePerimeter of squares, rectangles and trianglesCircumference of circlesArea of squares, rectangles and trianglesArea of circlesSurface area of cubes, cuboids and triangular prismsSurface area of cylindersVolume of cubes, cuboids and triangular prismsVolume of cylinders, cones, spheres and pyramids
Mean, median and modeRange, variation and standard deviation
Variables and expressionsOrder of operationsExpanding expressions with bracketsExponent basicsRadicals basicsEvaluating expressionsEvaluating a formula using substitutionSolving one-step equationsSolving two-step equationsSolving multi-step equationsTransposition
All about anglesSimilar trianglesThe Pythagorean TheoremIntroduction to sine, cosine and tangentFind an unknown side lengthFind an unknown angle measureUsing trig in the real world
This is the "Maths Help" page of the "math" guide.
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Last Updated: Feb 9, 2015 URL: Print Guide RSS Updates

Maths Help Print Page

Welcome to DIY Maths, Unitec's award-winning online maths textbook!

Integers Fractions Decimals
Percents DIY Maths Measurement
Statistics Algebra Trigonometry



How DIY Maths can help you

If you're studying a programme that requires competency in maths, the modules in DIY Maths can help you to refresh your skills or study new content. Within a module, you’ll find video lessons, content links, games, downloadable worksheets, practice quizzes, and links to 24/7 maths tutors.  Every module also provides search tips, so you can find your own information to supplement your learning. 



We're pleased to tell you that DIY Maths was named a "Best of LibGuides" site in 2013. Of the 400,000 LibGuides in the world, DIY Maths is one of about 50 chosen for Springshare's "Best of" collection! 


Browser capability

DIY Maths was developed using the Firefox browser, but it also works on Chrome, Safari and Internet Explorer.  If you're having problems with any of the links from DIY Maths, please make sure your browser is current, cookies are enabled, and that you have the current version of Adobe Acrobat, Flash and Java.  You might also need the current versions of QuickTime Player and Windows Media Player if you're viewing videos.


Table of Contents

Free mathematics resources

  • Khan Academy  Icon  Icon
    There are hundreds of videos, forums and quizzes on the Khan Academy website ranging from mathematics to economics. If you get a login, you can track your progress!
  • Mathisfun  Icon  Icon  Icon is a fantastic resource for basic maths through trigonometry. The site is colourful and engaging and includes lots of interactive exercises and quizzes.
  • Mathwarehouse  Icon holds an enormous variety of free online calculators and solvers.
  • Mathsphere  Icon is a great resource of many different types of maths paper that you can download and print.
  • WolframAlpha  Icon  Icon  Icon  Icon
    Explore mathematics with virtual manipulatives, problem solvers and visual solutions at Wolfram Alpha. Highly recommended if you like to explore!
  • Massachusetts Institute of Technology
    Ready for some advanced mathematics? Check out these free online resources put together by top mathematicians and scientists!

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