Unit 1

Name: ______________________________________Year _____ Section: _________

Question-1

Think back to when you were in primary school where you learned to organise numbers in multiples of ten, and then complete the table below.

Number Hundreds Tens Units

146 1 4 6

0 0 3

  5

 24

0 6 5

 93

131

1 7 9

2 1 3

255

Year 8 Computing Worksheet-1 2015-2016 Page 1|3

Unit 1

Question-2

Complete the table below, noting down all the different binary combinations you can make. The first few boxes have been completed for you.

1 bit 2 bits 3 bits 4 bits

1 11 111

0 10 110

Total number of 1 bit combinations:

___________

Total number of 2 bit combinations:

_______________

Total number of 3 bit combinations:

_______________

Total number of 4 bit combinations:

_______________

Question-3

You have seen how it is possible to count up to 7 in binary. How would you count to 8?

_______________________________________________________________________

_______________________________________________________________________

_______________________________________________________________________

_______________________________________________________________________

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Unit 1

Question-4

What is the largest number you can make with 1 bit? With 2 bits? With 3 bits? And with 4 bits? Use the table below to help you:

Number 8 4 2 1

0 0 0 0 0

1 0 0 0 1

3 0 0 1 1

0 1 1 1

1 1 1 1

1 bit =________________________________________________________________

2 bit = _______________________________________________________________

3 bit = _______________________________________________________________

4 bit = _______________________________________________________________

Question-5

What is the smallest number you can make regardless of the number of bits?

_______________________________________________________________________

_______________________________________________________________________

Question-6

Can you spot a pattern when working out the largest number with a given number of bits?

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Question-7

What would you have to do if you wanted to count to 16?

_______________________________________________________________________

_______________________________________________________________________

Question-8

What do you notice when you place a ‘0’ to the right of a ‘1’?

_______________________________________________________________________

______________________________________________________________________

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