Denary - binary

Question 1

Convert 170 from denary to binary
170 - 128 = 42
42 - 32 = 10
10 - 8 = 2
2 - 2 = 0

Answer 1

170 - 128 = 42
42 - 32 = 10
10 - 8 = 2
2 - 2 = 0

Place a 1 in 128
Place a 1 in 32
Place a 1 in 8
Place a 1 in 2

= 10101010

Question 2

how do you work out Denary to binary

Answer 2

1) Draw a binary place value table
128 64 32 16 8 4 2 1

2) Keep subtracting the biggest place values you can until you’re left with 0

3) If you subtracted a place value, put a 1 in that column, otherwise put a 0

Question 3

convert 255 into binary

Answer 3

11111111

Question 4

convert 254 into binary

Answer 4

11111110

Question 5

convert 163 into binary

Answer 5

10100011