Be Inspired: Watch
Check It Out: Computers do not use 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 etc. for counting. They use a system called binary which only uses 0 and 1. As computers count using the principle of something being ‘on’ or ‘off’. They use electronic circuits and this (on/off state) corresponds to an electrical current being present or not (1=on; 0=off).
Do Your Best: Can you
Extension Task: For those of you wanting an extra challenge.
Finally Fun!
Display Worksheet4.1.1 p.1 on the IWB and work through the first few to encode the letters of your own name in binary ëModel how to thread a particular colour bead (eg. red to represent 0, black for 1) for the first letter of your name and then clear bead to mark a space between letters (the separator for 5-bit encoding)
The children use the alphabet chart (Worksheet4.1.1 p2) to encode their first names into binary ëThey then use bead materials and necklace string to construct a binary bracelet that represents their name
Write a word in binary using the alphabet key (Worksheet4.1.1 p1) - eg. (00110 00001 00010 for FAB) on the boardëChallenge the children to decode the secret messageëThey could then encode their own secret messages for a partner to decode.
Bit = 1 (0 or 1) Byte = 8 bits Kilobyte (KB) = 1024 bytesMegabyte (MB) = 1024 KilobytesGigabyte (GB) = 1024 MBTerabyte (TB) = 1024 GB
https://www.theoaks.bham.sch.uk/ks2/
To understand what the binary code is, before we have to know what the binary numbers are.
The binary numbers are all those numbers formed by 0's and 1's, ie: 101, 11111, 1000011, etc etc etc.
The numbers that are used day by day to count, in the calendar ... that is, the normal numbers, are decimal numbers, that is, numbers composed of digits 0 through 9: 141341, 92921, 4552. These are the numbers Which we all know.
But what's the use of binary numbers? Many people will know that machines use binary coding to function, to communicate, to send messages, etc. This is because the machines are made up of electronic, magnetic, electronic components that can be on or off.
Do you know where I'm going? When the component is on, it corresponds to a 1, and when it is off, it corresponds to 0. Sounds easy, does not it? It is not so much. With these two numbers, the machines need to understand everything: numbers, colors, texts, positions, etc etc etc.
This is possible because every color, every letter, every number, has its representation in decimal number and then that decimal number, can be converted to binary number.
Now, to understand how the binary system works, and how to go from a decimal number to a binary number and let our computer know what we mean, we must understand how our decimal system works.
Take the number 524. At school we were taught that is 4 units, 2 in the tens and 5 in the hundreds. This means that 4 is 4, 2 is 20, and 5 is 500. The three numbers together in that order form 524.
But why 4 is 4, 2 is 20 and 5 is 500? That's due to the right-to-left position that has the digit in the number. That is, as it is a decimal system, each column or each position, is worth 10 times more than the column or position to its right.
10000 1000 100 10 1
5 2 4
Now if we multiply the value of each digit by the value of each column and add the columns, we would give the number 524.
4 x 1 + 2 x 10 + 5 x 100 = 4 + 20 + 500 = 524
Well, now that we understand this, the binary system is exactly the same, only instead of columns worth 10 times the value of its right, it is just 2.
512 256 128 64 32 16 8 4 2 1
1 0 0 0 0 0 1 1 0 0
If we now multiply each binary digit by the value of its column and then we add the columns, we will get 524 and we will know that the number 1000001100 corresponds to the number 524 in binary.
1 x 512 + 0 x 256 + 0 x 128 + 0 x 64 + 0 x 32 + 0 x 16 + 1 x 8 + 1 x 4 + 0 x 2 + 0 x 1=
512 + 0 + 0 + 0 + 0 + 0 + 8 + 4 + 0 + 0 = 524
Now that we know this, we can put with binary numbers anything that comes to mind. The only bad thing is that they occupy more, but it is the only way to make our computers know what we mean :)
