Year 7 Binary lesson 1

Convert 128 to binary

• 10000000
• 01111110
• 10000001
• 11001100

Convert 00010001 to decimal

• 17
• 27
• 37
• 47

80

• 8080808

• 1000101

• 1100011`

• 1001000

Add binary numbers shown?

• 10010000
• 10001000
• 10000100
• 10100000

Add binary numbers shown?

• 01111011
• 01101111
• 01111101
• 01101101

What are the only two numbers you can use in binary?

• 0 and 1
• 1 and 2
• 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
• 1, 2, 4, 8, 16

If a binary number ends with a 1, it must be...

• An odd number
• An even number
• A prime number
• The number 12

Which of these is the correct sequence for the place values for binary numbers?

• 1, 2, 4, 8, 16, 32, 64, 128
• 1, 2, 4, 6, 8, 10, 12, 14, 16
• 1, 2, 3, 4, 5, 6, 7, 8
• 0, 1

What is the point of binary?

• It represents how computers interpret electrical signals
• Because we like to make you do extra maths ;-D
• For the lulz
• Because it describes star systems

1101 1110

• ED
• DE
• EC
• CE