Free Grade 3 Introducing Equations with Brackets Common Errors Lesson Plans
Free Grade 3 lesson plans for Introducing Equations with Brackets Common Errors: 12 real questions with a full answer key and worked solutions. An equation is a balance. Do the same thing to both sides until the letter is on its own, then check by substituting back.
Free
Stretch
30 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- UnderstandExplain introducing equations with brackets common errors
Explain introducing equations with brackets common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate introducing equations with brackets common errors
Calculate introducing equations with brackets common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare introducing equations with brackets common errors
Compare introducing equations with brackets common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify introducing equations with brackets common errors
Justify introducing equations with brackets common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
Prerequisites
Close these gaps first — each has its own free lesson, worksheet and quiz.
How Introducing Equations with Brackets Common Errors works
An equation is a balance. Do the same thing to both sides until the letter is on its own, then check by substituting back.
12 practice questions
Easy to hard, 24 marks in total. Try them first, then open the answers.
- 1.Solve x + 15 = 18.[1]
- 2.Solve x + 9 = 14.[1]
- 3.Solve x + 17 = 17.[1]
- 4.Solve x + 8 = 17.[1]
- 5.Solve 3x + 3 = 12.[2]
- 6.Solve 2x + 11 = 5.[2]
- 7.Solve 9x + 16 = 124.[2]
- 8.Solve 4x + 14 = 50.[2]
- 9.Solve 6x + 16 = 2x + 28.[3]
- 10.Solve 7x + 13 = 2x + -27.[3]
- 11.Solve 7x + 2 = 1x + 26.[3]
- 12.Solve 2x + 3 = 1x + -1.[3]
Show answers and working
1. x = 3
Subtract 15 from both sides: x = 3. Check: 1 × 3 + 15 = 18.
2. x = 5
Subtract 9 from both sides: x = 5. Check: 1 × 5 + 9 = 14.
3. x = 0
Subtract 17 from both sides: x = 0. Check: 1 × 0 + 17 = 17.
4. x = 9
Subtract 8 from both sides: x = 9. Check: 1 × 9 + 8 = 17.
5. x = 3
Subtract 3 from both sides: 3x = 9. Divide by 3: x = 3. Check: 3 × 3 + 3 = 12.
6. x = -3
Subtract 11 from both sides: 2x = -6. Divide by 2: x = -3. Check: 2 × -3 + 11 = 5.
7. x = 12
Subtract 16 from both sides: 9x = 108. Divide by 9: x = 12. Check: 9 × 12 + 16 = 124.
8. x = 9
Subtract 14 from both sides: 4x = 36. Divide by 4: x = 9. Check: 4 × 9 + 14 = 50.
9. x = 3
Subtract 2x from both sides: 4x + 16 = 28. Subtract 16: 4x = 12. Divide by 4: x = 3.
10. x = -8
Subtract 2x from both sides: 5x + 13 = -27. Subtract 13: 5x = -40. Divide by 5: x = -8.
11. x = 4
Subtract 1x from both sides: 6x + 2 = 26. Subtract 2: 6x = 24. Divide by 6: x = 4.
12. x = -4
Subtract 1x from both sides: 1x + 3 = -1. Subtract 3: 1x = -4. Divide by 1: x = -4.
Worked examples
Solve x + 14 = 20.
- Subtract 14 from both sides: x = 6.
- Check: 1 × 6 + 14 = 20.
- Answer: x = 6
Solve 4x + 20 = 28.
- Subtract 20 from both sides: 4x = 8.
- Divide by 4: x = 2.
- Check: 4 × 2 + 20 = 28.
- Answer: x = 2
Solve 7x + 10 = 6x + 20.
- Subtract 6x from both sides: 1x + 10 = 20.
- Subtract 10: 1x = 10.
- Divide by 1: x = 10.
- Answer: x = 10
Interactive practice
Free, no account required — answer on screen or print it.
Common mistakes
What learners typically get wrong, and how to fix it.
Does an operation to only one side.
Correction: Keep the balance — both sides, every time.
Uses the wrong inverse (subtracts to undo multiplying).
Correction: Undo × with ÷ and + with −.
Teacher tips
- · Always ask pupils to substitute their answer back in.
Parent tips
- · 'I think of a number' puzzles at dinner.
Real-life applications
- · Working out an unknown price or time from a total.
Assessment objectives
How mastery is evidenced, and which standards it maps to.
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Frequently asked
- Is this Grade 3 Introducing Equations with Brackets Common Errors lesson plan really free?
- Yes. Every lesson plans on FreeMathWorksheet is free to use, print and share — no account, no paywall and no watermark.
- What should a learner already know before this?
- Start with Introducing Equations with Brackets Word Problems, Introducing Equations with Brackets Techniques, Two-step Equations. Each one has its own free lesson, worksheet and quiz.
- How is the lesson plan sequenced?
- Recognition first, then understanding, application, reasoning and finally mastery — the same ladder used across every free resource on the platform.
- What comes next after Introducing Equations with Brackets Common Errors?
- Move on to Working with Equations with Brackets, Equations with Brackets in Context, which build directly on this idea.
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