We can learn a lot of different things in Math class and this round, one of our lessons is about binary coded decimal. The binary number is a number system where it uses only two symbols which are 0 and 1 to express something. A binary coded decimal is a binary system where it converts numbers into binary. For example, number 18 can be written as 00010010 in the binary number. You can use the picture above to learn how binary coded decimal work. Each column of a binary row has its own value. The first column equals to 1, the second column equals to 2, the third column equals to 4 and it continues on and on. If you put number 1 in any column, you will have the value of that column. For example, if I put number 1 in the third column and I put 0 in the leftover columns, my number is 4. You can try this on your own with a different number.