☰ Contents · Computing

Revision

Lessons 17 · 1 lessons · B. Boltayev, M. Mahkamov, A. Azamatov, S. Rahmonqulova. Informatics and Information Technologies, Grade 7. Revised and expanded third edition. “O‘zbekiston milliy ensiklopediyasi” State Scientific Publishing House, Tashkent, 2017
Answers are for parents and teachers.
1
Compute 11011₂ – 1101₂ and check in decimal.
2
Convert the base-3 number 2101 to decimal.
3
Convert 140 to binary.
4
A picture is 640 × 480 pixels, 8 bits per pixel. How many KB is it?
5
Make a short list of 5 information-safety rules for yourself.