- 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
- StatisticsToggle Dropdown
- TrigonometryToggle Dropdown

In this module you can study how to substitute numbers into algebraic expressions.

The above video from Khan Academy explains how to evaluate expressions with one variable.

The above video from Khan Academy explains how to evaluate expressions with two variables.

An expression is not an equation.

You cannot solve an expression; you can only simplify it or evaluate it.

Some people try adding "= 0 " to the end of an expression when they want to "solve" it, but you cannot solve an expression.

- Study evaluating expressions with substitutionThis page from mathsisfun.com shows you how to use the substitution method to evaluate expressions. At the end you can take a quiz to test your understanding.
- Download a worksheet of evaluating expression with up to 2 variablesThis worksheet from Kuta software provides you with 24 two-variable expressions to evaluate.
- Download a worksheet of variable and verbal expressionsThis worksheet from Kuta software asks you to translate algebraic expressions into words and words into algebraic expressions. In the third section, you are asked to evaluate ten verbal expressions.
- Download a worksheet of evaluating expressions with three variablesThis worksheet from Kuta software lets you practice evaluating expressions with up to three variables.

Use these search terms to find additional resources:

*evaluating expressionsalgebraic expressions*