- 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 how to add decimal numbers.

The video above shows you how to add decimal numbers.

When you add two decimal numbers, you don't add the numbers before the decimal point separately from the numbers after the decimal point.

- Study decimal number additionRead about adding decimal numbers at mathsisfun.com and take a self-quiz at the end.
- Download a decimal number addition worksheetDesign and print a decimal number addition worksheet at math-aids.com. (Answers included!)

Use this search term to find additional resources:

*adding decimal numbers*