Year 7 Computing — 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.Which of these is the ordinary number 9 written in binary?
- a) 1010
- b) 1100
- c) 1001
- d) 110
2.Write the ordinary number 13 in binary, using only 0s and 1s.
3.Write the ordinary number 12 in binary, using only 0s and 1s.
4.Write the ordinary number 5 in binary, using only 0s and 1s.
5.Work out what each binary number means, then sort it by whether that ordinary number is odd or even.
Groups: Odd · Even
- 110
- 1000
- 1011
- 111
- 101
- 10
6.Tap the place on the line where the binary number "1010" belongs.
Mark the line with an X.
7.The binary places are 1, 2, 4, 8 reading from the right. What is the binary number "110" as an ordinary number?
8.How many different values can a single bit hold?
- a) 1
- b) 8
- c) 10
- d) 2