Free Grade 3 Simplifying Fractions Lesson Plans
Free Grade 3 lesson plans for Simplifying Fractions: 12 real questions with a full answer key and worked solutions. Simplifying means writing a fraction with the smallest possible numbers. Divide the numerator and denominator by their highest common factor.
Free
Higher
35 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- RememberIdentify simplifying fractions
Identify simplifying fractions accurately in a familiar context.
Assessed by: Exit ticket of four short items
- UnderstandExplain simplifying fractions
Explain simplifying fractions accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate simplifying fractions
Calculate simplifying fractions accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare simplifying fractions
Compare simplifying fractions 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 Simplifying Fractions works
Simplifying means writing a fraction with the smallest possible numbers. Divide the numerator and denominator by their highest common factor.
12 practice questions
Easy to hard, 24 marks in total. Try them first, then open the answers.
- 1.Simplify 15/18 fully.[1]
- 2.Simplify 3/9 fully.[1]
- 3.Simplify 6/15 fully.[1]
- 4.Simplify 10/12 fully.[1]
- 5.Simplify 12/36 fully.[2]
- 6.Simplify 6/18 fully.[2]
- 7.Simplify 10/15 fully.[2]
- 8.Simplify 6/24 fully.[2]
- 9.Simplify 20/50 fully.[3]
- 10.Simplify 14/28 fully.[3]
- 11.Simplify 15/24 fully.[3]
- 12.Simplify 18/36 fully.[3]
Show answers and working
1. 5/6
HCF of 15 and 18 is 3. Divide top and bottom by 3: 15÷3 / 18÷3. = 5/6
2. 1/3
HCF of 3 and 9 is 3. Divide top and bottom by 3: 3÷3 / 9÷3. = 1/3
3. 2/5
HCF of 6 and 15 is 3. Divide top and bottom by 3: 6÷3 / 15÷3. = 2/5
4. 5/6
HCF of 10 and 12 is 2. Divide top and bottom by 2: 10÷2 / 12÷2. = 5/6
5. 1/3
HCF of 12 and 36 is 12. Divide top and bottom by 12: 12÷12 / 36÷12. = 1/3
6. 1/3
HCF of 6 and 18 is 6. Divide top and bottom by 6: 6÷6 / 18÷6. = 1/3
7. 2/3
HCF of 10 and 15 is 5. Divide top and bottom by 5: 10÷5 / 15÷5. = 2/3
8. 1/4
HCF of 6 and 24 is 6. Divide top and bottom by 6: 6÷6 / 24÷6. = 1/4
9. 2/5
HCF of 20 and 50 is 10. Divide top and bottom by 10: 20÷10 / 50÷10. = 2/5
10. 1/2
HCF of 14 and 28 is 14. Divide top and bottom by 14: 14÷14 / 28÷14. = 1/2
11. 5/8
HCF of 15 and 24 is 3. Divide top and bottom by 3: 15÷3 / 24÷3. = 5/8
12. 1/2
HCF of 18 and 36 is 18. Divide top and bottom by 18: 18÷18 / 36÷18. = 1/2
Worked examples
Simplify 12/14 fully.
- HCF of 12 and 14 is 2.
- Divide top and bottom by 2: 12÷2 / 14÷2.
- = 6/7
- Answer: 6/7
Simplify 12/18 fully.
- HCF of 12 and 18 is 6.
- Divide top and bottom by 6: 12÷6 / 18÷6.
- = 2/3
- Answer: 2/3
Simplify 21/28 fully.
- HCF of 21 and 28 is 7.
- Divide top and bottom by 7: 21÷7 / 28÷7.
- = 3/4
- Answer: 3/4
Interactive practice
Free, no account required — answer on screen or print it.
Common mistakes
What learners typically get wrong, and how to fix it.
Stops after dividing once, leaving a fraction that can still be simplified.
Correction: Check again: do top and bottom still share a factor?
Divides top and bottom by different numbers.
Correction: Always divide both by the same number.
Teacher tips
- · Ask pupils to check their final answer has HCF 1.
Parent tips
- · Simplify sports stats, like 6 wins out of 8 games.
Real-life applications
- · Reporting results: 18/24 of the class becomes 3/4.
Assessment objectives
How mastery is evidenced, and which standards it maps to.
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Frequently asked
- Is this Grade 3 Simplifying Fractions 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 Equivalent Fractions, Mixed Numbers, Integers. 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 Simplifying Fractions?
- Move on to Comparing Fractions, Ordering Fractions, Fractions on a Number Line, Fraction Models, which build directly on this idea.
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