Course · Grades 6 to 8
Pre-Algebra
Order of operations, negative numbers, ratios and rates.
- Topics
- 3
- Worked examples
- 15
- Practice problems
- 10
Topics
-
Order of operations
Which calculation comes first in an expression.
Grades 6 to 8
-
Integers and negative numbers
Add and subtract positive and negative whole numbers.
Grades 6 to 8
-
Ratios, rates and proportions
Compare amounts, find unit rates and solve proportions.
Grades 6 to 8
Worked examples
- How to Use the Order of Operations (PEMDAS) Order of operations
- How to Evaluate an Algebraic Expression Order of operations
- How to Add and Subtract Negative Numbers Integers and negative numbers
- How to Solve a Proportion Ratios, rates and proportions
- How to Find a Unit Rate Ratios, rates and proportions
- How to Multiply Negative Numbers Integers and negative numbers
- How to Divide Negative Numbers Integers and negative numbers
- How to Find Absolute Value Integers and negative numbers
- How to Use Exponents in the Order of Operations Order of operations
- How to Simplify a Ratio Ratios, rates and proportions
- How to Add a Positive and a Negative Number Integers and negative numbers
- Order of Operations with Nested Parentheses Order of operations
- How to Find a Unit Price Ratios, rates and proportions
- How to Check if Two Ratios Are Equivalent Ratios, rates and proportions
- Order of Operations with Grouping Symbols Order of operations
Need the rules first? The Pre-Algebra formula sheet lists the key formulas and links back to these examples.
Ready to practice?
10 Pre-Algebra problems with answers, grouped by topic.