Activity Worksheet: It’s all about Hex - TeachWithICT
Activity Worksheet: It¡¯s all about Hex
Challenge 1: Hex to Denary
Can you convert the following Hex values to Denary?
4 [4]
10 [16]
A [10]
F [15]
14 [20]
2B [43]
1F [31]
FF [255]
Working out:
Challenge 2: Hex to Binary
Can you convert the following Hex values to Binary?
8 [1000]
4 [0100]
A [1010]
F [1111]
12 [0001 0010]
1B [0001 1011]
6A [0110 1010]
90 [1001 0000]
Working out:
Challenge 3: Binary to Hex
Can you convert the following Binary values to Hex?
0010 [2]
0100 [4]
1100 [C]
1111 [F]
1010 0101 [A5]
1011 0001 [B1]
0110 1011 [6B]
1110 1111 [EF]
Working out:
teachwithict.
Extension Task
Challenge 4: Denary to Hex
To convert a denary number to hex:
1.
2.
3.
4.
Divide the denary number by 16
Write down the remainder and convert it to hexadecimal
Divide the result again by 16
Repeat step 2 and 3 until the result is 0
For example, to convert the denary number 188:
Divide by 16
188 / 16 =
11 / 16 =
Result
11
0
Remainder
12
11
Remainder (in Hex)
C
B
Answer:
B
C
Calculating the remainder.
If using a calculator the remainder can be calculated using the following method:
Divide the denary number by 16. For example: 141 / 16 = 8.8125
Subtract the whole number from your answer: 8.8125 ¨C 8 = 0.8125
Multiply what¡¯s left by 16: 0.8125 x 16 = 13
Thus giving you a remainder of: 13
Tip: If you are finding this too difficult, you can convert the denary number to binary first
and then convert the answer to binary to hex.
Can you convert the following Denary values to Hex?
6 [6]
10 [A]
15 [F]
22 [16]
36 [24]
98 [62]
128 [80]
160 [A0]
Working out:
teachwithict.
Challenge 5: Hex Addition
Can you add the following hex numbers?
Hint: Add them together by first converting them to binary and then converting
them back to hex. You must show your working out.
1 + 2 [3]
5 + 5 [A]
7 + 8 [F]
1 + A [B]
F + F [1E]
10 + 10 []
10 + F [1F]
12 + 1A [2C]
Working out:
teachwithict.
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