- Maths Help
- Algebra
- 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

- IntegersToggle Dropdown
- 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
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In this module you can study radicals, such as square roots and cube roots.

The 11-minute video above is a long explanation of square roots and radicals. She starts by reviewing how to square a number. If you want to skip that part, start the video at 3:00.

This video demonstrates how taking a square root of a number is the opposite of squaring a number.

The number inside the radical sign is called the radicand.

Radicals are the inverse of exponents. For example, to "undo" a square, you take the square root.

- Study square rootsTake a lesson in square roots at math.com. At the end of the lesson, there's an online quiz to help you check your understanding.
- Study cube rootsRead about cube roots at mathsisfun.com. At the end of the tutorial, you can take a quiz to check your understanding.

Use this search term to find additional resources:

*square rootsworking with radicals in algebramathematics radicals*