About this worksheet

This free Year 8 simplifying algebraic expressions worksheet is written for the Western Australian curriculum and mapped to SCSA content description WA8MNAA2. It targets one skill so students can practise until it sticks: by the end, students can say “I can collect like terms, including negative terms and several pronumerals, and check equivalence by substituting.”

What’s inside

• Key idea box – a short explanation with worked examples to read before starting.
• A · Fluency (16 questions) – quick practice to build accuracy.
• B · Core (10 questions) – worded problems set in everyday Australian contexts.
• C · Reasoning (4 questions) – explain, justify and spot the error.
• D · Challenge (4 questions) – harder multi-step and problem-solving questions for students ready to stretch.
• Separate marking key – every answer with working, plus mark allocations and marking criteria for reasoning questions.

Skills covered

• Collecting like terms, including negative terms
• Simplifying expressions with several pronumerals and x² terms
• Checking equivalence by substituting

How to use this worksheet

Start with the Key idea box, then complete Section A (use a calculator only where a question says so). Most students should attempt Sections B and C; Section D suits students aiming for the top of the class or preparing for accelerated or extension maths. The worksheet is marked out of 58, and the score box on the last page helps students see which section needs more practice.

Common mistakes to watch for

• Combining unlike terms such as 3x and x²
• Losing the sign in front of a term
• Writing 2a + 3b as 5ab
• Treating x as 0 instead of 1x

Where this fits in the WA Year 8 sequence

Simplifying Algebraic Expressions sits in the Algebraic techniques sub-strand of Number and algebra. It is one of a set of short, single-skill EduLift worksheets that split each Year 8 content description into sub-skills. Use the previous and next links to work through the sequence in order.

Common errors we see in tutoring

• Combining unlike terms such as 3x and x²
• Losing the sign in front of a term
• Writing 2a + 3b as 5ab
• Treating x as 0 instead of 1x