Computer Science

a mathematical operation where two or more numbers are combined to find their total

the extra value that moves to the next column when the sum of digits in a place value exceeds the base

Binary addition

Why do computers use binary?

Number bases

Binary subtraction

Binary shifts

Hexadecimal

Hexadecimal number conversions

In this unit pupils will be reminded of how the base-10 number system works before being introduced to the base-2 number system. They will perform conversions between binary and decimal and recognise the rules of binary addition and subtraction. They will be introduced to hexadecimal and its uses.

Representation of numbers

Counting in binary follows similar principles to counting in {{}}.

Match the binary addition rule to the correct result.

Add together these two binary numbers:

1010 + 101

Add together these two binary numbers:

1111 + 111

What is the maximum decimal number that can be represented by 5 binary digits?

Add together these three binary numbers:

100 + 10 + 1

In the decimal number 3,728 what digit is in the hundreds place?

What is the value of the '1' in the binary number 10,000?

What is the decimal equivalent of the binary number 11011?

What is the binary representation of the decimal number 53?

Exit Quiz

Counting in binary follows similar principles to counting in .