KSP Математика 6 grade: Вычитание чисел
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Introduction
This Grade 6 Mathematics lesson plan on “Subtracting Numbers” helps teachers teach students to perform subtraction with positive and negative numbers, understand rules, and apply them in problem solving.
Main material
Lesson objective: to develop the skill of subtracting numbers, including positive and negative, and using this knowledge in calculations and practical situations.
Expected outcomes:
students know rules for subtraction;
transform subtraction into addition with the opposite number;
correctly calculate expressions with positive and negative numbers;
apply knowledge in practical problems.
Lesson structure:
Organization
Greeting.
Prior knowledge
Review addition with different signs, absolute value, comparing numbers.
New topic
Subtraction: a − b = a + (−b)
Examples:
• 5 − 3 = 2
• 3 − 5 = -2
• -4 − 6 = -10
• -3 − (-2) = -1
Practice
Compute: 7 − 9, -5 − 3, 6 − (-2), -4 − (-7)
Practical problem: night temperature -2°C, daytime +3°C. Find change.
Consolidation
Pair work: discuss solutions, check calculations, explain steps.
Reflection
Discuss applications (temperature, finance, water levels).
Conclusion
Summary, brief feedback, mention results (5–10%).
Teaching methods: explanation, practical work, pair work, visualization, discussion.
Frequently Asked Questions
What is subtraction?
Finding the difference between two numbers.
How to subtract a negative number?
Subtracting a negative number equals adding its opposite: a − (-b) = a + b.
Example:
5 − 3 = 2, -4 − 6 = -10
How to determine the sign of the result?
Use the rule of addition with the opposite number.
Where is subtraction used?
Mathematics, temperature, finance, practical calculations.