Free Grade 3 Adding Integers in Context Common Errors Lessons
Free Grade 3 lessons for Adding Integers in Context Common Errors: 12 real questions with a full answer key and worked solutions. Integers include negative numbers. On a number line, adding moves right and subtracting moves left. Subtracting a negative is the same as adding.
Free
Higher
20 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- RememberIdentify adding integers in context common errors
Identify adding integers in context common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- UnderstandExplain adding integers in context common errors
Explain adding integers in context common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate adding integers in context common errors
Calculate adding integers in context common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare adding integers in context common errors
Compare adding integers in context 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 Adding Integers in Context Common Errors works
Integers include negative numbers. On a number line, adding moves right and subtracting moves left. Subtracting a negative is the same as adding.
12 practice questions
Easy to hard, 24 marks in total. Try them first, then open the answers.
- 1.0 − 2 = ?[1]
- 2.10 + 6 = ?[1]
- 3.9 + 0 = ?[1]
- 4.7 − 8 = ?[1]
- 5.-5 × 8 = ?[2]
- 6.-18 + 2 = ?[2]
- 7.9 × 0 = ?[2]
- 8.-10 × (-13) = ?[2]
- 9.-4 × 4 = ?[3]
- 10.6 − (-15) = ?[3]
- 11.-19 × 22 = ?[3]
- 12.-12 × 3 = ?[3]
Show answers and working
1. -2
Subtracting 2 is the same as adding -2. 0 + (-2) = -2
2. 16
Start at 10 on a number line. Move 6 right. You land on 16.
3. 9
Start at 9 on a number line. Move 0 right. You land on 9.
4. -1
Subtracting 8 is the same as adding -8. 7 + (-8) = -1
5. -40
Multiply the sizes: 5 × 8 = 40. Same signs give positive, different signs give negative. Answer: -40
6. -16
Start at -18 on a number line. Move 2 right. You land on -16.
7. 0
Multiply the sizes: 9 × 0 = 0. Same signs give positive, different signs give negative. Answer: 0
8. 130
Multiply the sizes: 10 × 13 = 130. Same signs give positive, different signs give negative. Answer: 130
9. -16
Multiply the sizes: 4 × 4 = 16. Same signs give positive, different signs give negative. Answer: -16
10. 21
Subtracting (-15) is the same as adding 15. 6 + 15 = 21
11. -418
Multiply the sizes: 19 × 22 = 418. Same signs give positive, different signs give negative. Answer: -418
12. -36
Multiply the sizes: 12 × 3 = 36. Same signs give positive, different signs give negative. Answer: -36
Worked examples
-10 − (-2) = ?
- Subtracting (-2) is the same as adding 2.
- -10 + 2 = -8
- Answer: -8
2 − 3 = ?
- Subtracting 3 is the same as adding -3.
- 2 + (-3) = -1
- Answer: -1
-10 + (-27) = ?
- Start at -10 on a number line.
- Move 27 left.
- You land on -37.
- Answer: -37
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 −8 is bigger than −3.
Correction: Further left on the number line means smaller.
Treats − (−4) as −4.
Correction: Two minus signs together become a plus.
Teacher tips
- · Use a vertical number line like a thermometer.
Parent tips
- · Compare winter temperatures from the weather forecast.
Real-life applications
- · Temperatures below zero, bank balances, floors below ground.
Assessment objectives
How mastery is evidenced, and which standards it maps to.
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Frequently asked
- Is this Grade 3 Adding Integers in Context Common Errors lesson really free?
- Yes. Every lessons 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 Adding Integers in Context Word Problems, Adding Integers in Context Techniques, Working with Adding Integers. Each one has its own free lesson, worksheet and quiz.
- How is the lesson 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 Adding Integers in Context Common Errors?
- Move on to Introducing Adding Integers, Working with Adding Integers, which build directly on this idea.
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