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Lesson 7 · grade 7–9
Binary code: the machine\u2019s language
📖 Lesson
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🎯 Quiz — pick the translation
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✅ Lesson done
The computer knows only two states: power on / power off — 1 and 0. Everything else is combinations: letter A = 01000001, a pixel = 24 bits of color, a photo = millions of pixels, a video = 25 photos a second. Counting binary is easy: 1, 10, 11, 100, 101 — each place doubles (1, 2, 4, 8, 16).
- ●1010 (binary) = 8 + 2 = 10 (decimal)
- ●Text: ASCII/Unicode encodes letters as numbers
- ●Emoji 😀 is also a number (U+1F600) in Unicode
🖱 Your skill: convert your age to binary — the first programmer step.
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Test yourself!
Quiz — pick the translation →
🖨 Worksheet
Practice the topic with the trainer — like after class