- Maths Help
- AlgebraToggle Dropdown
- Decimals
- 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
- StatisticsToggle Dropdown
- TrigonometryToggle Dropdown

In this module, you can study the concept of place value and have an introduction to the decimal number system. Also included on this page are the concepts of expanded form and word form of decimal numbers.

The video above explains the basic concept of place value. The example is based on South African money (the "rand"), but you can mentally translate this to "dollar" if you like.

The video above provides a visual example (no words!) about how to convert a number between standard, expanded and word form.

Digits to the left of the decimal point represent whole numbers; digits to the right of the decimal point represent parts or fractions of numbers.

- Study the decimal number systemRead about the decimal number system at mathsisfun.com. When you're done reading, you can take a self-quiz to check your understanding.
- Download an expanded-to-standard form worksheetDesign and print a worksheet with problems where you convert expanded form to standard form.
- Download a standard-to-expanded form worksheetDesign and print a worksheet of problems for converting standard form to expanded form.
- Quiz yourself on place valueSee if you understand the value of each position of a decimal number at onlinemathlearning.com. (This quiz only looks at digits to the left of the decimal place.)

Use this search term to find additional resources:

*place value*