1×23+1×22+0×21+1×201 cross 2 cubed plus 1 cross 2 squared plus 0 cross 2 to the first power plus 1 cross 2 to the 0 power =8+4+0+1=13equals 8 plus 4 plus 0 plus 1 equals 13 💡 131013 sub 10
Multiply each digit by 2 raised to the power of its position (starting from 0 on the right):
📌 Topic 1: Units of Information (Единицы измерения информации) reshenie primerov po informatike dlia 8 klassa
This involves evaluating logical expressions using AND (∧ / конъюнкция), OR (∨ / дизъюнкция), and NOT (¬ / инверсия). Example 4:
Divide the number by 2 repeatedly and record the remainders from bottom to top: with a remainder of 1 with a remainder of 0 with a remainder of 1 with a remainder of 0 with a remainder of 0 with a remainder of 1 Reading the remainders from the last to the first gives: 100101100101 💡 Answer: 1001012100101 sub 2 Example 3: Convert Binary to Decimal Question: Convert the binary number 110121101 sub 2 to the decimal system. 1×23+1×22+0×21+1×201 cross 2 cubed plus 1 cross 2
This guide covers the core topics typically studied in the 8th grade, including number systems, units of information, and basic boolean logic.
Find the value of the logical expression (X > 5) AND NOT (X > 10) for Solution: Substitute into the expression: : This is True (1). : This is False (0). Apply the NOT operation: NOT FalseNOT False = True (1). Combine with AND: True AND TrueTrue AND True = True . 💡 Answer: True (Истина) 🎓 Practice Quiz Find the value of the logical expression (X
This topic focuses on converting between bits, bytes, kilobytes, and megabytes. 1 byte = 8 bits 1 Kilobyte (KB) = 1024 bytes 1 Megabyte (MB) = 1024 KB Example 1: