Free Grade 3 Adding Integers Lesson Plans
Free Grade 3 lesson plans for 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
Foundation
25 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- RememberIdentify adding integers
Identify adding integers accurately in a familiar context.
Assessed by: Exit ticket of four short items
- UnderstandExplain adding integers
Explain adding integers accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate adding integers
Calculate adding integers accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare adding integers
Compare 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 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.-7 − (-4) = ?[1]
- 2.-1 + 9 = ?[1]
- 3.10 + 2 = ?[1]
- 4.2 − (-4) = ?[1]
- 5.15 × (-6) = ?[2]
- 6.-12 − 18 = ?[2]
- 7.6 − (-4) = ?[2]
- 8.14 − 8 = ?[2]
- 9.-23 − 29 = ?[3]
- 10.3 + 0 = ?[3]
- 11.25 + (-23) = ?[3]
- 12.-9 + 1 = ?[3]
Show answers and working
1. -3
Subtracting (-4) is the same as adding 4. -7 + 4 = -3
2. 8
Start at -1 on a number line. Move 9 right. You land on 8.
3. 12
Start at 10 on a number line. Move 2 right. You land on 12.
4. 6
Subtracting (-4) is the same as adding 4. 2 + 4 = 6
5. -90
Multiply the sizes: 15 × 6 = 90. Same signs give positive, different signs give negative. Answer: -90
6. -30
Subtracting 18 is the same as adding -18. -12 + (-18) = -30
7. 10
Subtracting (-4) is the same as adding 4. 6 + 4 = 10
8. 6
Subtracting 8 is the same as adding -8. 14 + (-8) = 6
9. -52
Subtracting 29 is the same as adding -29. -23 + (-29) = -52
10. 3
Start at 3 on a number line. Move 0 right. You land on 3.
11. 2
Start at 25 on a number line. Move 23 left. You land on 2.
12. -8
Start at -9 on a number line. Move 1 right. You land on -8.
Worked examples
-1 + 10 = ?
- Start at -1 on a number line.
- Move 10 right.
- You land on 9.
- Answer: 9
15 + 4 = ?
- Start at 15 on a number line.
- Move 4 right.
- You land on 19.
- Answer: 19
-26 + 5 = ?
- Start at -26 on a number line.
- Move 5 right.
- You land on -21.
- Answer: -21
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 Adding Integers
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Frequently asked
- Is this Grade 3 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, Negative Numbers, Number Formation. 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 Adding Integers?
- Move on to Subtracting Integers, Multiplying Integers, Absolute Value, Whole Numbers, which build directly on this idea.
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