Free Simplifying Algebraic Expressions Worksheets (Grades 6-8)

Practice simplifying algebraic expressions (Grades 6-8) with free printable PDF worksheets. 4 pre-packaged classroom sets with 100% verified step-by-step answer keys, plus an unlimited live customizer for teachers and homeschoolers.

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PanMaths.comSimplifying Algebraic Expressions WorksheetsSet A (Standard)
Name: __________________________
Date: _____________ Period: ____
Score: _____ / 10
Directions: Solve each problem carefully. Show all intermediate work in the workspace provided.
1.
2x+6x
2.
5x+5x
3.
2x+8x
4.
3x+7x
5.
6x+9x
6.
4x+2+7x
7.
3x+3x
8.
2x+4+3x
9.
5x+7+2x
10.
5x+7+2x
PanMaths.com • Free Printable Math WorksheetsPage 1 of 2
PanMaths.comAnswer Key & Worked Solutions • Set A (Standard)
Answer Key
Total Problems: 10
Teacher & Parent Guide: Intermediate evaluation steps are provided for step-by-step grading and student self-correction.
1.
2x+6x= 8x
1. Identify Like Terms: Both terms share variable x
2. Add Coefficients: (2 + 6)x = 8x
3. Simplified Expression: 8x ✅
2.
5x+5x= 10x
1. Identify Like Terms: Both terms share variable x
2. Add Coefficients: (5 + 5)x = 10x
3. Simplified Expression: 10x ✅
3.
2x+8x= 10x
1. Identify Like Terms: Both terms share variable x
2. Add Coefficients: (2 + 8)x = 10x
3. Simplified Expression: 10x ✅
4.
3x+7x= 10x
1. Identify Like Terms: Both terms share variable x
2. Add Coefficients: (3 + 7)x = 10x
3. Simplified Expression: 10x ✅
5.
6x+9x= 15x
1. Identify Like Terms: Both terms share variable x
2. Add Coefficients: (6 + 9)x = 15x
3. Simplified Expression: 15x ✅
6.
4x+2+7x= 11x + 2
1. Group Like Terms: (4x + 7x) + (2 + 0)
2. Combine Coefficients & Constants: (11)x + 2
3. Simplified Expression: 11x + 2 ✅
7.
3x+3x= 6x
1. Identify Like Terms: Both terms share variable x
2. Add Coefficients: (3 + 3)x = 6x
3. Simplified Expression: 6x ✅
8.
2x+4+3x= 5x + 4
1. Group Like Terms: (2x + 3x) + (4 + 0)
2. Combine Coefficients & Constants: (5)x + 4
3. Simplified Expression: 5x + 4 ✅
9.
5x+7+2x= 7x + 7
1. Group Like Terms: (5x + 2x) + (7 + 0)
2. Combine Coefficients & Constants: (7)x + 7
3. Simplified Expression: 7x + 7 ✅
10.
5x+7+2x= 7x + 7
1. Group Like Terms: (5x + 2x) + (7 + 0)
2. Combine Coefficients & Constants: (7)x + 7
3. Simplified Expression: 7x + 7 ✅
PanMaths.com • Answer Key & SolutionsPage 2 of 2
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Explore Interactive Tools for Simplifying Algebraic Expressions Worksheets

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Worksheet Info

Categoryalgebra
Grade LevelGrades 6–8
DifficultyEasy (Combine Like Terms) to Hard (Distributive Property)
Time10–15 min

Skills Practiced

  • Combining like terms
  • Distributive property a(bx + c)
  • Variable coefficient addition
  • Linear expression simplification
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💡 1. What are Like Terms?

Like terms have the exact same variable and exponent (e.g. 4x and 7x, or constants like 5 and 9). Terms with different variables (like 3x and 2y) cannot be added together!

💡 2. Add or Subtract Only the Coefficients

When combining 5x + 3x, add the front numbers: (5 + 3)x = 8x. The variable stays unchanged.

💡 3. Watch the Negative Signs!

The sign in front of each term belongs to that term. In 6x + 4 − 2x + 5, group as (6x − 2x) + (4 + 5) = 4x + 9.

Worksheet Facts by Grade Level

Grade LevelCCSS StandardExpression Complexity
Grade 6Generate equivalent expressions using properties of operations (CCSS.6.EE.A.3)Combining single-variable terms (3x + 5x)
Grade 7Apply properties of operations as strategies to add and subtract linear expressions (CCSS.7.EE.A.1)4-term expressions with integer coefficients (4x + 3 + 2x - 1)
Grade 8 / Algebra 1Expand expressions using distributive property and solve multi-step equations (CCSS.HSA.SSE.A.1)Distributive expansions: 3(2x + 4) + 2(x + 5)

Why Simplifying Expressions is the Cornerstone of Algebra

Applying properties of operations to generate equivalent expressions (CCSS.6.EE.A.3 and 7.EE.A.1) is the essential bridge from arithmetic to high school algebra.

Simplifying expressions allows students to condense complex mathematical formulas into clean, solvable equations. It eliminates clutter and prevents calculation errors in physics, geometry, and calculus.

The 3-Step Expression Simplification Protocol

  • Step 1: Distribute First: If there are parentheses, multiply the outside factor by every term inside: $a(bx + c) = abx + ac$.
  • Step 2: Reorder & Group: Group like terms containing the variable together, and group independent constants together.
  • Step 3: Combine Coefficients: Add or subtract coefficients and write in standard linear form ($Ax + B$).
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Benefits of Mastery

🧩 Grouping Intuition

Teaches students to categorize algebraic terms by variable type and power.

⚡ Distributive Mastery

Builds automaticity expanding parentheses before combining like terms.

🧠 Pre-Algebra Readiness

Directly prepares students for multi-step linear and quadratic equations.

🖨️ Clean Printable Answer Keys

Shows step-by-step term grouping and coefficient arithmetic on every sheet.

Frequently Asked Questions

Can you combine 3x and 4x²?

No. Even though they have the same letter (x), they have different exponents (x¹ vs x²). Only terms with the same variable AND same exponent can be combined.

What is the coefficient of a bare variable like x?

A bare variable has an invisible coefficient of 1 (x = 1x). A negative variable has a coefficient of -1 (-x = -1x).

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Click "Unlimited & Shuffle" to generate fresh randomized algebra worksheets with customizable difficulty and problem counts.