Computer Science

when binary digits are moved left or right, multiplying or dividing them by powers of 2

when a number is too large to be represented in the available binary digits

when a number is too small to be represented in the available binary digits

Binary shifts

Why do computers use binary?

Number bases

Binary addition

Binary subtraction

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

when digits are rounded down as they drop near zero

a number that is too large to be represented

What is an overflow in binary operations?

Which of the following can cause overflow?

The result must fit within the allocated memory.

What should be considered when storing binary multiplication results?

What number system uses only the digits 0 and 1?

What is the base of the decimal number system?

What is the result of the binary addition 1 + 1?

What is the result of the binary addition 11001 + 111?

Binary shifts

Lesson outcome