Converting Between Number Bases (AQA GCSE Computer Science): Flashcards
📚Flashcards
Practise the cards
14 cards from this deck
ShowHide
Practise the cards
14 cards from this deck
What is the number base of binary?
What is the number base of binary?
Base 2
Which digits are used in binary?
Which digits are used in binary?
0 and 1 only
What is the number base of decimal?
What is the number base of decimal?
Base 10
Which digits are used in decimal?
Which digits are used in decimal?
0 to 9
8-bit binary place values (left to right)
8-bit binary place values (left to right)
128, 64, 32, 16, 8, 4, 2, 1
Pattern of binary place values
Pattern of binary place values
Each doubles the previous; follows
Method: binary to decimal conversion
Method: binary to decimal conversion
Add up all place values where there's a 1
Where to start when aligning binary number?
Where to start when aligning binary number?
Right side (1s column)
Method: decimal to binary conversion
Method: decimal to binary conversion
Subtraction from largest to smallest place value
When to put 1 in decimal to binary?
When to put 1 in decimal to binary?
If place value remaining number, put 1 & subtract
When to put 0 in decimal to binary?
When to put 0 in decimal to binary?
If place value > remaining number
Max decimal for 8-bit binary (GCSE)
Max decimal for 8-bit binary (GCSE)
255
Can you reuse place values in conversions?
Can you reuse place values in conversions?
No - each used only once
How to check conversion accuracy?
How to check conversion accuracy?
Convert back the other way to verify