Free Grade 3 Introducing Adding Decimals Essentials Worksheets
Free Grade 3 worksheets for Introducing Adding Decimals Essentials: 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
Higher
25 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- RememberIdentify introducing adding decimals essentials
Identify introducing adding decimals essentials accurately in a familiar context.
Assessed by: Exit ticket of four short items
- UnderstandExplain introducing adding decimals essentials
Explain introducing adding decimals essentials accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate introducing adding decimals essentials
Calculate introducing adding decimals essentials accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare introducing adding decimals essentials
Compare introducing adding decimals essentials 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 Adding Decimals Essentials 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.
- 1.70.2 − 60 = ?[1]
- 2.65.3 − 22.9 = ?[1]
- 3.75.6 + 43.6 = ?[1]
- 4.6.5 + 72.1 = ?[1]
- 5.0.78 + 4.86 = ?[2]
- 6.5.52 + 7.33 = ?[2]
- 7.4.38 + 0.39 = ?[2]
- 8.3.01 + 3.99 = ?[2]
- 9.0.384 × 2 = ?[3]
- 10.0.781 × 4 = ?[3]
- 11.0.69 × 4 = ?[3]
- 12.0.789 × 5 = ?[3]
Show answers and working
1. 10.2
Line up the decimal points. Fill gaps with zeros so both have 1 decimal place. Subtract as whole numbers: 10.2.
2. 42.4
Line up the decimal points. Fill gaps with zeros so both have 1 decimal place. Subtract as whole numbers: 42.4.
3. 119.2
Line up the decimal points. Fill gaps with zeros so both have 1 decimal place. Add as whole numbers: 119.2.
4. 78.6
Line up the decimal points. Fill gaps with zeros so both have 1 decimal place. Add as whole numbers: 78.6.
5. 5.64
Line up the decimal points. Fill gaps with zeros so both have 2 decimal places. Add as whole numbers: 5.64.
6. 12.85
Line up the decimal points. Fill gaps with zeros so both have 2 decimal places. Add as whole numbers: 12.85.
7. 4.77
Line up the decimal points. Fill gaps with zeros so both have 2 decimal places. Add as whole numbers: 4.77.
8. 7
Line up the decimal points. Fill gaps with zeros so both have 2 decimal places. Add as whole numbers: 7.
9. 0.768
Ignore the decimal: 384 × 2 = 768. Put back 3 decimal places: 0.768.
10. 3.124
Ignore the decimal: 781 × 4 = 3124. Put back 3 decimal places: 3.124.
11. 2.76
Ignore the decimal: 690 × 4 = 2760. Put back 3 decimal places: 2.76.
12. 3.945
Ignore the decimal: 789 × 5 = 3945. Put back 3 decimal places: 3.945.
Worked examples
2 + 99.5 = ?
- Line up the decimal points.
- Fill gaps with zeros so both have 1 decimal place.
- Add as whole numbers: 101.5.
- Answer: 101.5
9.01 + 5.51 = ?
- Line up the decimal points.
- Fill gaps with zeros so both have 2 decimal places.
- Add as whole numbers: 14.52.
- Answer: 14.52
0.315 × 3 = ?
- Ignore the decimal: 315 × 3 = 945.
- Put back 3 decimal places: 0.945.
- Answer: 0.945
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 Introducing Adding Decimals Essentials
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Frequently asked
- Is this Grade 3 Introducing Adding Decimals Essentials worksheet really free?
- Yes. Every worksheets 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 Rounding Decimals. Each one has its own free lesson, worksheet and quiz.
- How is the worksheet 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 Adding Decimals Essentials?
- Move on to Introducing Adding Decimals Techniques, Introducing Adding Decimals Word Problems, Introducing Adding Decimals Common Errors, Working with Adding Decimals, which build directly on this idea.
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