Class 6 Computer Science — Bits and binary numbers

Read a binary number using the place values 1, 2, 4 and 8, and write a small ordinary number in binary.

Name: ________________________

Before you start

Move along the line and count in ones. Every time you pass 1, 2, 4, 8 or 16 you are passing a place value that binary uses as a column.

Those five landmarks are the only numbers binary needs a single 1 to write: 1, 10, 100, 1000, 10000.

1.The binary places are 1, 2, 4, 8 reading from the right. What is the binary number "1011" as an ordinary number?
2.Write the ordinary number 5 in binary, using only 0s and 1s.
3.Work out what each binary number means, then sort it by whether that ordinary number is odd or even.
Groups: Odd · Even
- 1011
- 101
- 10
- 111
- 1000
- 110
4.The binary places are 1, 2, 4, 8 reading from the right. What is the binary number "110" as an ordinary number?
5.How many different values can a single bit hold?
- a) 2
- b) 10
- c) 8
- d) 1
6.Write the ordinary number 12 in binary, using only 0s and 1s.
7.Which of these is the ordinary number 9 written in binary?
- a) 110
- b) 1010
- c) 1001
- d) 1100
8.Put these binary numbers in order, smallest first.
- 11
- 1
- 10
- 111
- 100