Preview: Conversion of 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:

Convert base 10 (decimal) numbers to base 2 (binary) using the division-by-2 method.

Rationale (Preview)

Converting between number systems is essential for understanding how computers process data.

Presentation Steps (Preview)

Step / Time	Teacher's Activities	Student's Activities	Learning Points
Introduction (5 min)	Write 13₁₀. Ask: 'Can we write this in binary?' Explain that we convert by dividing by 2 repeatedly. [Preview only]	Students follow the division steps. They convert 5 to 101₂ alongside the teacher.	To convert decimal to binary, repeatedly divide by 2 and read remainders from bottom to top.
Step 1 (10 min)	Give: 7, 10, 14, 15. 7₁₀ → 7÷2=3 r1; 3÷2=1 r1; 1÷2=0 r1 → 111₂. 10₁₀ → 10÷2=5 r0; 5÷2=2 r1; 2÷2=1 r0 [Preview only]	Students convert in their notebooks. They compare answers with partners.	Step-by-step division gives the binary equivalent.
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