Free Grade 3 Working with Comparing Decimals Quizzes
Free Grade 3 quizzes for Working with Comparing Decimals: 12 real questions with a full answer key and worked solutions. Decimals extend place value past the ones: tenths, hundredths, thousandths. Line up decimal points when adding or subtracting.
Free
Core
30 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- RememberIdentify working with comparing decimals
Identify working with comparing decimals accurately in a familiar context.
Assessed by: Exit ticket of four short items
- UnderstandExplain working with comparing decimals
Explain working with comparing decimals accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate working with comparing decimals
Calculate working with comparing decimals accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare working with comparing decimals
Compare working with comparing decimals 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 Working with Comparing Decimals works
Decimals extend place value past the ones: tenths, hundredths, thousandths. Line up decimal points when adding or subtracting.
12 practice questions
Easy to hard, 24 marks in total. Try them first, then open the answers.
- 1.56.8 + 73 = ?[1]
- 2.92.8 − 76.7 = ?[1]
- 3.51.8 + 66.4 = ?[1]
- 4.51.1 + 96.8 = ?[1]
- 5.4.77 − 0.68 = ?[2]
- 6.2.2 + 8.16 = ?[2]
- 7.9.94 − 9.41 = ?[2]
- 8.4.09 + 9.12 = ?[2]
- 9.0.435 × 2 = ?[3]
- 10.0.029 × 3 = ?[3]
- 11.0.053 × 7 = ?[3]
- 12.0.69 × 2 = ?[3]
Show answers and working
1. 129.8
Line up the decimal points. Fill gaps with zeros so both have 1 decimal place. Add as whole numbers: 129.8.
2. 16.1
Line up the decimal points. Fill gaps with zeros so both have 1 decimal place. Subtract as whole numbers: 16.1.
3. 118.2
Line up the decimal points. Fill gaps with zeros so both have 1 decimal place. Add as whole numbers: 118.2.
4. 147.9
Line up the decimal points. Fill gaps with zeros so both have 1 decimal place. Add as whole numbers: 147.9.
5. 4.09
Line up the decimal points. Fill gaps with zeros so both have 2 decimal places. Subtract as whole numbers: 4.09.
6. 10.36
Line up the decimal points. Fill gaps with zeros so both have 2 decimal places. Add as whole numbers: 10.36.
7. 0.53
Line up the decimal points. Fill gaps with zeros so both have 2 decimal places. Subtract as whole numbers: 0.53.
8. 13.21
Line up the decimal points. Fill gaps with zeros so both have 2 decimal places. Add as whole numbers: 13.21.
9. 0.87
Ignore the decimal: 435 × 2 = 870. Put back 3 decimal places: 0.87.
10. 0.087
Ignore the decimal: 29 × 3 = 87. Put back 3 decimal places: 0.087.
11. 0.371
Ignore the decimal: 53 × 7 = 371. Put back 3 decimal places: 0.371.
12. 1.38
Ignore the decimal: 690 × 2 = 1380. Put back 3 decimal places: 1.38.
Worked examples
23.5 + 38.3 = ?
- Line up the decimal points.
- Fill gaps with zeros so both have 1 decimal place.
- Add as whole numbers: 61.8.
- Answer: 61.8
2.11 + 6.94 = ?
- Line up the decimal points.
- Fill gaps with zeros so both have 2 decimal places.
- Add as whole numbers: 9.05.
- Answer: 9.05
0.623 × 9 = ?
- Ignore the decimal: 623 × 9 = 5607.
- Put back 3 decimal places: 5.607.
- Answer: 5.607
Interactive practice
Free, no account required — answer on screen or print it.
Common mistakes
What learners typically get wrong, and how to fix it.
Thinks 0.25 is bigger than 0.3 because 25 > 3.
Correction: Fill with zeros: 0.25 vs 0.30.
Lines up the last digits instead of the decimal points.
Correction: Decimal points go in one straight column.
Teacher tips
- · Use money to make tenths and hundredths concrete.
Parent tips
- · Add up prices with cents together.
Real-life applications
- · Money, measurements, race times.
Assessment objectives
How mastery is evidenced, and which standards it maps to.
Every free resource for Working with Comparing Decimals
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Frequently asked
- Is this Grade 3 Working with Comparing Decimals quiz really free?
- Yes. Every quizzes 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 Comparing Decimals, Reading Decimals. Each one has its own free lesson, worksheet and quiz.
- How is the quiz 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 Working with Comparing Decimals?
- Move on to Comparing Decimals in Context, Decimal Place Value, Reading Decimals, Rounding Decimals, which build directly on this idea.
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