Free Grade 3 Working with Negative Numbers Common Errors Lesson Plans
Free Grade 3 lesson plans for Working with Negative Numbers Common Errors: 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 working with negative numbers common errors
Explain working with negative numbers common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate working with negative numbers common errors
Calculate working with negative numbers common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare working with negative numbers common errors
Compare working with negative numbers common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify working with negative numbers common errors
Justify working with negative numbers common errors 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 Working with Negative Numbers Common Errors 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.
- 1.1 + (-8) = ?[1]
- 2.8 − (-9) = ?[1]
- 3.-10 − (-4) = ?[1]
- 4.-3 + (-3) = ?[1]
- 5.11 − 1 = ?[2]
- 6.-4 × (-19) = ?[2]
- 7.14 − (-7) = ?[2]
- 8.20 × 6 = ?[2]
- 9.30 − 22 = ?[3]
- 10.3 × 0 = ?[3]
- 11.3 − (-2) = ?[3]
- 12.16 + 25 = ?[3]
Show answers and working
1. -7
Start at 1 on a number line. Move 8 left. You land on -7.
2. 17
Subtracting (-9) is the same as adding 9. 8 + 9 = 17
3. -6
Subtracting (-4) is the same as adding 4. -10 + 4 = -6
4. -6
Start at -3 on a number line. Move 3 left. You land on -6.
5. 10
Subtracting 1 is the same as adding -1. 11 + (-1) = 10
6. 76
Multiply the sizes: 4 × 19 = 76. Same signs give positive, different signs give negative. Answer: 76
7. 21
Subtracting (-7) is the same as adding 7. 14 + 7 = 21
8. 120
Multiply the sizes: 20 × 6 = 120. Same signs give positive, different signs give negative. Answer: 120
9. 8
Subtracting 22 is the same as adding -22. 30 + (-22) = 8
10. 0
Multiply the sizes: 3 × 0 = 0. Same signs give positive, different signs give negative. Answer: 0
11. 5
Subtracting (-2) is the same as adding 2. 3 + 2 = 5
12. 41
Start at 16 on a number line. Move 25 right. You land on 41.
Worked examples
-2 − (-5) = ?
- Subtracting (-5) is the same as adding 5.
- -2 + 5 = 3
- Answer: 3
-2 − (-13) = ?
- Subtracting (-13) is the same as adding 13.
- -2 + 13 = 11
- Answer: 11
-27 + (-29) = ?
- Start at -27 on a number line.
- Move 29 left.
- You land on -56.
- Answer: -56
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 Working with Negative Numbers Common Errors 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 Working with Negative Numbers Word Problems, Working with Negative Numbers Techniques, Introducing Negative Numbers. 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 Working with Negative Numbers Common Errors?
- Move on to Introducing Negative Numbers, Negative Numbers in Context, which build directly on this idea.
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