Free Grade 3 Introducing Adding Integers Common Errors Lesson Plans
Free Grade 3 lesson plans for Introducing Adding Integers 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
35 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- RememberIdentify introducing adding integers common errors
Identify introducing adding integers common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- UnderstandExplain introducing adding integers common errors
Explain introducing adding integers common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate introducing adding integers common errors
Calculate introducing adding integers common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare introducing adding integers common errors
Compare introducing adding integers 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 Introducing Adding Integers 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.-7 − 8 = ?[1]
- 2.-5 + (-6) = ?[1]
- 3.-6 − 5 = ?[1]
- 4.-8 − 6 = ?[1]
- 5.-4 + (-6) = ?[2]
- 6.-13 + (-10) = ?[2]
- 7.18 × 12 = ?[2]
- 8.-16 × 3 = ?[2]
- 9.-13 × 18 = ?[3]
- 10.-11 − (-4) = ?[3]
- 11.-1 + 12 = ?[3]
- 12.14 × (-24) = ?[3]
Show answers and working
1. -15
Subtracting 8 is the same as adding -8. -7 + (-8) = -15
2. -11
Start at -5 on a number line. Move 6 left. You land on -11.
3. -11
Subtracting 5 is the same as adding -5. -6 + (-5) = -11
4. -14
Subtracting 6 is the same as adding -6. -8 + (-6) = -14
5. -10
Start at -4 on a number line. Move 6 left. You land on -10.
6. -23
Start at -13 on a number line. Move 10 left. You land on -23.
7. 216
Multiply the sizes: 18 × 12 = 216. Same signs give positive, different signs give negative. Answer: 216
8. -48
Multiply the sizes: 16 × 3 = 48. Same signs give positive, different signs give negative. Answer: -48
9. -234
Multiply the sizes: 13 × 18 = 234. Same signs give positive, different signs give negative. Answer: -234
10. -7
Subtracting (-4) is the same as adding 4. -11 + 4 = -7
11. 11
Start at -1 on a number line. Move 12 right. You land on 11.
12. -336
Multiply the sizes: 14 × 24 = 336. Same signs give positive, different signs give negative. Answer: -336
Worked examples
-9 + (-9) = ?
- Start at -9 on a number line.
- Move 9 left.
- You land on -18.
- Answer: -18
-9 − (-13) = ?
- Subtracting (-13) is the same as adding 13.
- -9 + 13 = 4
- Answer: 4
-19 + (-9) = ?
- Start at -19 on a number line.
- Move 9 left.
- You land on -28.
- Answer: -28
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 Introducing Adding Integers Common Errors 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 Introducing Adding Integers Word Problems, Introducing Adding Integers Techniques, Integer Number Line. 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 Introducing Adding Integers Common Errors?
- Move on to Working with Adding Integers, Adding Integers in Context, which build directly on this idea.
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