Free Grade 3 Introducing Integer Number Line Lessons
Free Grade 3 lessons for Introducing Integer Number Line: 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
Core
20 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- UnderstandExplain introducing integer number line
Explain introducing integer number line accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate introducing integer number line
Calculate introducing integer number line accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare introducing integer number line
Compare introducing integer number line accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify introducing integer number line
Justify introducing integer number line 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 Integer Number Line 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.
- 1.4 − 4 = ?[1]
- 2.6 − 9 = ?[1]
- 3.3 − (-2) = ?[1]
- 4.-8 + 3 = ?[1]
- 5.19 × 18 = ?[2]
- 6.4 − 8 = ?[2]
- 7.1 − 20 = ?[2]
- 8.-20 − (-17) = ?[2]
- 9.10 + (-22) = ?[3]
- 10.-14 − 1 = ?[3]
- 11.10 − (-21) = ?[3]
- 12.-2 + (-14) = ?[3]
Show answers and working
1. 0
Subtracting 4 is the same as adding -4. 4 + (-4) = 0
2. -3
Subtracting 9 is the same as adding -9. 6 + (-9) = -3
3. 5
Subtracting (-2) is the same as adding 2. 3 + 2 = 5
4. -5
Start at -8 on a number line. Move 3 right. You land on -5.
5. 342
Multiply the sizes: 19 × 18 = 342. Same signs give positive, different signs give negative. Answer: 342
6. -4
Subtracting 8 is the same as adding -8. 4 + (-8) = -4
7. -19
Subtracting 20 is the same as adding -20. 1 + (-20) = -19
8. -3
Subtracting (-17) is the same as adding 17. -20 + 17 = -3
9. -12
Start at 10 on a number line. Move 22 left. You land on -12.
10. -15
Subtracting 1 is the same as adding -1. -14 + (-1) = -15
11. 31
Subtracting (-21) is the same as adding 21. 10 + 21 = 31
12. -16
Start at -2 on a number line. Move 14 left. You land on -16.
Worked examples
-2 + (-8) = ?
- Start at -2 on a number line.
- Move 8 left.
- You land on -10.
- Answer: -10
1 × 20 = ?
- Multiply the sizes: 1 × 20 = 20.
- Same signs give positive, different signs give negative.
- Answer: 20
- Answer: 20
-6 + (-28) = ?
- Start at -6 on a number line.
- Move 28 left.
- You land on -34.
- Answer: -34
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.
Every free resource for Introducing Integer Number Line
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Frequently asked
- Is this Grade 3 Introducing Integer Number Line 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 Negative Numbers. 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 Introducing Integer Number Line?
- Move on to Working with Integer Number Line, Integer Number Line in Context, Negative Numbers, Adding Integers, which build directly on this idea.
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