Free Grade 3 Comparing Decimals Quizzes
Free Grade 3 quizzes for 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
Foundation
15 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- UnderstandExplain comparing decimals
Explain comparing decimals accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate comparing decimals
Calculate comparing decimals accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare comparing decimals
Compare comparing decimals accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify comparing decimals
Justify 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 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.
- 1.93.7 + 15.9 = ?[1]
- 2.73.9 − 70.8 = ?[1]
- 3.4.3 + 5.4 = ?[1]
- 4.35.5 + 10.4 = ?[1]
- 5.9.33 − 0.99 = ?[2]
- 6.8.4 + 0.49 = ?[2]
- 7.8 − 4.84 = ?[2]
- 8.8.57 + 6.64 = ?[2]
- 9.0.316 × 5 = ?[3]
- 10.0.622 × 4 = ?[3]
- 11.0.093 × 9 = ?[3]
- 12.0.529 × 8 = ?[3]
Show answers and working
1. 109.6
Line up the decimal points. Fill gaps with zeros so both have 1 decimal place. Add as whole numbers: 109.6.
2. 3.1
Line up the decimal points. Fill gaps with zeros so both have 1 decimal place. Subtract as whole numbers: 3.1.
3. 9.7
Line up the decimal points. Fill gaps with zeros so both have 1 decimal place. Add as whole numbers: 9.7.
4. 45.9
Line up the decimal points. Fill gaps with zeros so both have 1 decimal place. Add as whole numbers: 45.9.
5. 8.34
Line up the decimal points. Fill gaps with zeros so both have 2 decimal places. Subtract as whole numbers: 8.34.
6. 8.89
Line up the decimal points. Fill gaps with zeros so both have 2 decimal places. Add as whole numbers: 8.89.
7. 3.16
Line up the decimal points. Fill gaps with zeros so both have 2 decimal places. Subtract as whole numbers: 3.16.
8. 15.21
Line up the decimal points. Fill gaps with zeros so both have 2 decimal places. Add as whole numbers: 15.21.
9. 1.58
Ignore the decimal: 316 × 5 = 1580. Put back 3 decimal places: 1.58.
10. 2.488
Ignore the decimal: 622 × 4 = 2488. Put back 3 decimal places: 2.488.
11. 0.837
Ignore the decimal: 93 × 9 = 837. Put back 3 decimal places: 0.837.
12. 4.232
Ignore the decimal: 529 × 8 = 4232. Put back 3 decimal places: 4.232.
Worked examples
78.3 − 14.2 = ?
- Line up the decimal points.
- Fill gaps with zeros so both have 1 decimal place.
- Subtract as whole numbers: 64.1.
- Answer: 64.1
2.87 + 5.18 = ?
- Line up the decimal points.
- Fill gaps with zeros so both have 2 decimal places.
- Add as whole numbers: 8.05.
- Answer: 8.05
0.927 × 9 = ?
- Ignore the decimal: 927 × 9 = 8343.
- Put back 3 decimal places: 8.343.
- Answer: 8.343
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 Comparing Decimals
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Frequently asked
- Is this Grade 3 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 Reading Decimals, Decimal Place Value, Fractions. 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 Comparing Decimals?
- Move on to Rounding Decimals, Adding Decimals, Multiplying Decimals, Dividing Decimals, which build directly on this idea.
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