Free Grade 3 Working with Introducing Adding Integers Common Errors Lesson Plans
Free Grade 3 lesson plans for Working with 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
15 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- RememberIdentify working with introducing adding integers common errors
Identify working with introducing adding integers common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- UnderstandExplain working with introducing adding integers common errors
Explain working with introducing adding integers common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate working with introducing adding integers common errors
Calculate working with introducing adding integers common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare working with introducing adding integers common errors
Compare working with 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 Working with 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.
- 1.10 − 10 = ?[1]
- 2.-3 − (-2) = ?[1]
- 3.4 + (-1) = ?[1]
- 4.3 + 9 = ?[1]
- 5.20 − (-4) = ?[2]
- 6.6 − (-11) = ?[2]
- 7.-9 × (-5) = ?[2]
- 8.-2 × (-12) = ?[2]
- 9.8 + (-11) = ?[3]
- 10.-23 − (-15) = ?[3]
- 11.16 − (-22) = ?[3]
- 12.1 × 20 = ?[3]
Show answers and working
1. 0
Subtracting 10 is the same as adding -10. 10 + (-10) = 0
2. -1
Subtracting (-2) is the same as adding 2. -3 + 2 = -1
3. 3
Start at 4 on a number line. Move 1 left. You land on 3.
4. 12
Start at 3 on a number line. Move 9 right. You land on 12.
5. 24
Subtracting (-4) is the same as adding 4. 20 + 4 = 24
6. 17
Subtracting (-11) is the same as adding 11. 6 + 11 = 17
7. 45
Multiply the sizes: 9 × 5 = 45. Same signs give positive, different signs give negative. Answer: 45
8. 24
Multiply the sizes: 2 × 12 = 24. Same signs give positive, different signs give negative. Answer: 24
9. -3
Start at 8 on a number line. Move 11 left. You land on -3.
10. -8
Subtracting (-15) is the same as adding 15. -23 + 15 = -8
11. 38
Subtracting (-22) is the same as adding 22. 16 + 22 = 38
12. 20
Multiply the sizes: 1 × 20 = 20. Same signs give positive, different signs give negative. Answer: 20
Worked examples
6 − 0 = ?
- Subtracting 0 is the same as adding 0.
- 6 + 0 = 6
- Answer: 6
3 × (-15) = ?
- Multiply the sizes: 3 × 15 = 45.
- Same signs give positive, different signs give negative.
- Answer: -45
- Answer: -45
-12 × (-7) = ?
- Multiply the sizes: 12 × 7 = 84.
- Same signs give positive, different signs give negative.
- Answer: 84
- Answer: 84
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
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- Start with Rules and Methods in Introducing Adding Integers Common Errors, Key Vocabulary of Introducing Adding Integers Common Errors, Introducing Adding Integers Word Problems. Each one has its own free lesson, worksheet and quiz.
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- Move on to Introducing Adding Integers Common Errors in Examinations, Introducing Adding Integers Essentials, Introducing Adding Integers Techniques, Introducing Adding Integers Word Problems, which build directly on this idea.
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