Free Grade 3 Introducing Adding Integers Lesson Plans
Free Grade 3 lesson plans 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
Stretch
15 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.-3 − (-4) = ?[1]
- 2.7 + (-5) = ?[1]
- 3.-3 + (-10) = ?[1]
- 4.-7 − 1 = ?[1]
- 5.-6 × (-6) = ?[2]
- 6.17 × (-12) = ?[2]
- 7.13 − (-4) = ?[2]
- 8.3 − (-15) = ?[2]
- 9.-3 − 23 = ?[3]
- 10.17 − 17 = ?[3]
- 11.-7 + 3 = ?[3]
- 12.-15 × (-15) = ?[3]
Show answers and working
1. 1
Subtracting (-4) is the same as adding 4. -3 + 4 = 1
2. 2
Start at 7 on a number line. Move 5 left. You land on 2.
3. -13
Start at -3 on a number line. Move 10 left. You land on -13.
4. -8
Subtracting 1 is the same as adding -1. -7 + (-1) = -8
5. 36
Multiply the sizes: 6 × 6 = 36. Same signs give positive, different signs give negative. Answer: 36
6. -204
Multiply the sizes: 17 × 12 = 204. Same signs give positive, different signs give negative. Answer: -204
7. 17
Subtracting (-4) is the same as adding 4. 13 + 4 = 17
8. 18
Subtracting (-15) is the same as adding 15. 3 + 15 = 18
9. -26
Subtracting 23 is the same as adding -23. -3 + (-23) = -26
10. 0
Subtracting 17 is the same as adding -17. 17 + (-17) = 0
11. -4
Start at -7 on a number line. Move 3 right. You land on -4.
12. 225
Multiply the sizes: 15 × 15 = 225. Same signs give positive, different signs give negative. Answer: 225
Worked examples
5 − 4 = ?
- Subtracting 4 is the same as adding -4.
- 5 + (-4) = 1
- Answer: 1
9 × (-13) = ?
- Multiply the sizes: 9 × 13 = 117.
- Same signs give positive, different signs give negative.
- Answer: -117
- Answer: -117
21 × (-26) = ?
- Multiply the sizes: 21 × 26 = 546.
- Same signs give positive, different signs give negative.
- Answer: -546
- Answer: -546
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 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 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?
- 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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