- Maths Help
- AlgebraToggle Dropdown
- DecimalsToggle Dropdown
- Place value
- Comparing and ordering decimals
- Rounding to a place
- Significant figures
- Standard form and engineering notation
- Adding decimals
- Subtracting decimals
- Multiplying decimals
- Dividing decimals
- Converting decimals to fractions
- Converting decimals to percents
- Converting between decimals, fractions and percents
- Ordering decimals, fractions and percents

- FractionsToggle Dropdown
- Understanding fractions
- Simplifying (reducing) fractions
- Equivalent fractions
- Comparing fractions
- Ordering fractions
- Mixed numbers and improper fractions
- Adding fractions
- Subtracting fractions
- Adding and subtracting mixed numbers
- Multiplying fractions
- Dividing fractions
- Multiplying and dividing mixed numbers
- Converting fractions to decimals
- Converting fractions to percents
- Converting between fractions, decimals and percents
- Ordering fractions, decimals and percents

- Integers
- MeasurementToggle Dropdown
- Metric units of measure
- Perimeter of squares, rectangles and triangles
- Circumference of circles
- Area of squares, rectangles and triangles
- Area of circles
- Surface area of cubes, cuboids and triangular prisms
- Surface area of cylinders
- Volume of cubes, cuboids and triangular prisms
- Volume of cylinders, cones, spheres and pyramids

- PercentsToggle Dropdown
- StatisticsToggle Dropdown
- TrigonometryToggle Dropdown

- The number lineAll real numbers can be plotted in a line called a "Number Line". In this unit, you can learn how to make a number line and how to put numbers on it.
- Ordering negative numbersIn this unit, you can study how to put negative numbers in order from least to greatest.
- Number oppositesThis unit shows you how to find the opposite (or additive inverse) of any integer.
- Absolute valueIn this unit, you can learn how to find the absolute value (or distance from zero) of any integer.

- Adding and subtracting with negative numbersIn this module you can study how to add and subtract with negative numbers.
- Multiplying with negative numbersIn this module, you can learn how to multiply with negative numbers.
- Dividing with negative numbersIn this module, you can learn how to divide with negative numbers.

DIY Maths does not cover these topics:

You may study them by clicking the links to online tutorials at Khan Academy.