The document discusses different numeral systems including binary and decimal. It provides the following key points: - Binary system uses only two numbers: 0 and 1. It is identified with suffixes like "B" or "102". - Decimal system uses numbers 0-9. There are no identifying suffixes used. - When converting between systems like binary to decimal, one must divide or multiply by powers of the base (2 for binary, 10 for decimal) and rewrite the result in the opposite order. Pictures are provided as examples.

1. On the first front, we'll take Binary system.
This system can use only 2 numbers (that's
why it's called 'base-2 numeral system').
Can you say what are the numbers?

2. If you said 1 and 2 – I’m sorry, you failed :P
Each system use numbers from 0
from 1.
(!) not
Binary system uses 0 and 1. If there are
more numbers – that’s not binary system.

3. There are 2 ways to identify this system:
•Mostly, people use: 101001102
•But you can find also: 10100110B

4. Now, we'll take Decimal system.
This system can uses 10 numbers. We all
know that system, we use it every day in
our lives. Can you say the numbers?

5. If you said 0-9, you’re right!
We don’t use any signs to indetify this numer
system (well, that’s metod – there’s no signs :P).
If you don’t know what I mean by ‘signs’, look at
this:
8310AF16
‘Signs’
1001012
2858
2013  See? There’s no sign

6. Before we head on to the calculations, I must tell you
very important thing.
!Pronunciation!
• Decimal: We don’t pronunce each number
separately, but all together (I mean:
100 – we pronunce one hundred, not one-zero-zero
25 – twenty five, not two-five
Etc.
• EACH OTHER:
1002 One-Zero-Zero in Binary
10102 One-Zero-One-Zero in Binary
85AF16 Eight-Five-A-F in Hexadecimal
–
–
–

7. Now, we’ll move on to calculating the numbers
between systems (binary and decimal).
Are you ready ? Let’s go!

8. Decimal -> Binary
If we have number 112 and we want to write it in
binary, we must divide 112 by 2 (because we use binary
system), and then the result of dividing divide again and
again up to we reach 0.
Don’t understand? So look at the picture below 
Remember!
You must rewrite the
result reverse!

9. Binary -> Decimal
This thing may be little bit harder for you. We have number
100102 and we want write this in decimal system.
How to do that:
1. Number the numbers start from 0 (number them from
right side to left side)
2. And now look at the picture, cause I have no idea how to
explain this :P