Free Grade 3 Integer Number Line in Context Common Errors Lessons
Free Grade 3 lessons for Integer Number Line 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
Foundation
35 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- RememberIdentify integer number line in context common errors
Identify integer number line in context common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- UnderstandExplain integer number line in context common errors
Explain integer number line in context common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate integer number line in context common errors
Calculate integer number line in context common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare integer number line in context common errors
Compare integer number line 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 Integer Number Line 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.
- 1.7 + 7 = ?[1]
- 2.-4 + 8 = ?[1]
- 3.-1 + (-9) = ?[1]
- 4.5 − 2 = ?[1]
- 5.10 × (-2) = ?[2]
- 6.8 − (-18) = ?[2]
- 7.-12 × 6 = ?[2]
- 8.-5 − (-20) = ?[2]
- 9.19 − (-1) = ?[3]
- 10.-17 + (-14) = ?[3]
- 11.13 + 17 = ?[3]
- 12.-21 × 29 = ?[3]
Show answers and working
1. 14
Start at 7 on a number line. Move 7 right. You land on 14.
2. 4
Start at -4 on a number line. Move 8 right. You land on 4.
3. -10
Start at -1 on a number line. Move 9 left. You land on -10.
4. 3
Subtracting 2 is the same as adding -2. 5 + (-2) = 3
5. -20
Multiply the sizes: 10 × 2 = 20. Same signs give positive, different signs give negative. Answer: -20
6. 26
Subtracting (-18) is the same as adding 18. 8 + 18 = 26
7. -72
Multiply the sizes: 12 × 6 = 72. Same signs give positive, different signs give negative. Answer: -72
8. 15
Subtracting (-20) is the same as adding 20. -5 + 20 = 15
9. 20
Subtracting (-1) is the same as adding 1. 19 + 1 = 20
10. -31
Start at -17 on a number line. Move 14 left. You land on -31.
11. 30
Start at 13 on a number line. Move 17 right. You land on 30.
12. -609
Multiply the sizes: 21 × 29 = 609. Same signs give positive, different signs give negative. Answer: -609
Worked examples
7 + (-8) = ?
- Start at 7 on a number line.
- Move 8 left.
- You land on -1.
- Answer: -1
3 × (-19) = ?
- Multiply the sizes: 3 × 19 = 57.
- Same signs give positive, different signs give negative.
- Answer: -57
- Answer: -57
-27 − (-9) = ?
- Subtracting (-9) is the same as adding 9.
- -27 + 9 = -18
- Answer: -18
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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Frequently asked
- Is this Grade 3 Integer Number Line 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 Integer Number Line in Context Word Problems, Integer Number Line in Context Techniques, Working with Integer Number Line. 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 Integer Number Line in Context Common Errors?
- Move on to Introducing Integer Number Line, Working with Integer Number Line, which build directly on this idea.
Related resources
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