Free Grade 3 Subtracting Integers Lesson Plans
Free Grade 3 lesson plans for Subtracting 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
25 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- UnderstandExplain subtracting integers
Explain subtracting integers accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate subtracting integers
Calculate subtracting integers accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare subtracting integers
Compare subtracting integers accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify subtracting integers
Justify subtracting 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 Subtracting 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.
- 1.6 − (-5) = ?[1]
- 2.-8 − 1 = ?[1]
- 3.-8 − 3 = ?[1]
- 4.-6 + (-5) = ?[1]
- 5.12 × (-3) = ?[2]
- 6.-10 × 10 = ?[2]
- 7.-11 × 14 = ?[2]
- 8.0 × 10 = ?[2]
- 9.-18 − 5 = ?[3]
- 10.23 + (-20) = ?[3]
- 11.28 + (-20) = ?[3]
- 12.-6 + (-14) = ?[3]
Show answers and working
1. 11
Subtracting (-5) is the same as adding 5. 6 + 5 = 11
2. -9
Subtracting 1 is the same as adding -1. -8 + (-1) = -9
3. -11
Subtracting 3 is the same as adding -3. -8 + (-3) = -11
4. -11
Start at -6 on a number line. Move 5 left. You land on -11.
5. -36
Multiply the sizes: 12 × 3 = 36. Same signs give positive, different signs give negative. Answer: -36
6. -100
Multiply the sizes: 10 × 10 = 100. Same signs give positive, different signs give negative. Answer: -100
7. -154
Multiply the sizes: 11 × 14 = 154. Same signs give positive, different signs give negative. Answer: -154
8. 0
Multiply the sizes: 0 × 10 = 0. Same signs give positive, different signs give negative. Answer: 0
9. -23
Subtracting 5 is the same as adding -5. -18 + (-5) = -23
10. 3
Start at 23 on a number line. Move 20 left. You land on 3.
11. 8
Start at 28 on a number line. Move 20 left. You land on 8.
12. -20
Start at -6 on a number line. Move 14 left. You land on -20.
Worked examples
1 + (-10) = ?
- Start at 1 on a number line.
- Move 10 left.
- You land on -9.
- Answer: -9
3 × (-2) = ?
- Multiply the sizes: 3 × 2 = 6.
- Same signs give positive, different signs give negative.
- Answer: -6
- Answer: -6
24 + (-10) = ?
- Start at 24 on a number line.
- Move 10 left.
- You land on 14.
- Answer: 14
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 Subtracting 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 Adding Integers, Integer Number Line, 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 Subtracting Integers?
- Move on to Multiplying Integers, Absolute Value, Whole Numbers, Counting, which build directly on this idea.
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