Preview: Basic Operations on Whole Numbers

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Lesson Details (Preview)

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Duration: 40 minutes

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Learning Objectives (Preview)

By the end of the lesson, students should be able to:

Rationale (Preview)

Basic operations are the foundation of all mathematics and are used daily in shopping, banking, and problem‑solving.

Presentation Steps (Preview)

Step / Time	Teacher's Activities	Student's Activities	Learning Points
Introduction (5 min)	Write: 23 + 15, 45 – 12, 7 × 6, 24 ÷ 6. Ask students to solve. 23 + 15 = 38 (addition). 45 – 12 = 33 [Preview only]	Students solve quickly and share answers.	The four basic operations are addition (+), subtraction (–), multiplication (×), and division (÷).
Step 1 (10 min)	456 + 378 → align digits → 456 + 378 = 834. 504 – 287 → borrow from hundreds → 504 – 287 = 217. Give [Preview only]	Students solve addition and subtraction problems, showing borrowing and carrying.	Addition: align digits by place value and carry. Subtraction: borrow when the top digit is smaller.
+3 more steps in full version

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