Free Grade 3 Introducing Adding Integers Lessons
Free Grade 3 lessons for Introducing Adding Integers: 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
30 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- UnderstandExplain introducing adding integers
Explain introducing adding integers accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate introducing adding integers
Calculate introducing adding integers accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare introducing adding integers
Compare introducing adding integers accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify introducing adding integers
Justify introducing adding integers 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 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.-8 − (-2) = ?[1]
- 2.4 − 10 = ?[1]
- 3.-4 + 4 = ?[1]
- 4.-8 + 4 = ?[1]
- 5.5 × 1 = ?[2]
- 6.2 − (-18) = ?[2]
- 7.-11 + 0 = ?[2]
- 8.-18 − (-1) = ?[2]
- 9.-4 − 25 = ?[3]
- 10.26 + (-10) = ?[3]
- 11.18 − (-2) = ?[3]
- 12.-9 + 13 = ?[3]
Show answers and working
1. -6
Subtracting (-2) is the same as adding 2. -8 + 2 = -6
2. -6
Subtracting 10 is the same as adding -10. 4 + (-10) = -6
3. 0
Start at -4 on a number line. Move 4 right. You land on 0.
4. -4
Start at -8 on a number line. Move 4 right. You land on -4.
5. 5
Multiply the sizes: 5 × 1 = 5. Same signs give positive, different signs give negative. Answer: 5
6. 20
Subtracting (-18) is the same as adding 18. 2 + 18 = 20
7. -11
Start at -11 on a number line. Move 0 right. You land on -11.
8. -17
Subtracting (-1) is the same as adding 1. -18 + 1 = -17
9. -29
Subtracting 25 is the same as adding -25. -4 + (-25) = -29
10. 16
Start at 26 on a number line. Move 10 left. You land on 16.
11. 20
Subtracting (-2) is the same as adding 2. 18 + 2 = 20
12. 4
Start at -9 on a number line. Move 13 right. You land on 4.
Worked examples
-6 + 0 = ?
- Start at -6 on a number line.
- Move 0 right.
- You land on -6.
- Answer: -6
11 − 13 = ?
- Subtracting 13 is the same as adding -13.
- 11 + (-13) = -2
- Answer: -2
12 × 13 = ?
- Multiply the sizes: 12 × 13 = 156.
- Same signs give positive, different signs give negative.
- Answer: 156
- Answer: 156
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 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. 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 Adding Integers?
- Move on to Working with Adding Integers, Adding Integers in Context, Negative Numbers, Integer Number Line, which build directly on this idea.
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