Ordered Rajasthan Patwari lessons and chapter tests
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We have only 10 digits: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
Every other number is just these digits combined. Like letters make words.
Where a digit sits decides its value.
We read from RIGHT to LEFT:
digit
digit
digit
digit
Key Trick: Each place is 10 times bigger than the place to its right.
Take 4,582 from the chart:
This is how we show we really understood it:
That's it. Every big number is just addition of its places.
Everything in maths is one of these:
)
)
If you master place value, the 4 operations become 10x easier.
Practice this lesson
BIT = Binary Digit. The smallest unit in a computer.
It's just a switch:
That's it. A computer can't think "A" or "5" directly, it only understands ON/OFF.
1 BYTE = 8 BITS
Why 8? Because with 8 switches you get
different combinations. That's enough to store every letter, number, and symbol on your keyboard.
Example from the image:01010110 = 1 byte = 1 character (like "V")
So:
A or aThis is where it connects to your real life:
| Unit | Stands for | How big is it? | Real Example |
|---|---|---|---|
| KB | Kilobyte | \~ 1,000 bytes | 1 small email |
| MB | Megabyte | \~ 1,000 KB | 1 photo |
| GB | Gigabyte | \~ 1,000 MB | 1 hour of HD video, your phone RAM |
| TB | Terabyte | \~ 1,000 GB | Your laptop hard disk |
| PB | Petabyte | \~ 1,000 TB | All of YouTube's storage |
Tech note: Computers technically use 1024, not 1000 (1 KB = 1024 bytes). Companies simplify it to 1000 for us. For basics, remember 1000.
This is important:
So 100 Mbps speed will download a 100 MB file in about 8 seconds, not 1 second.
Just like decimal place value was
... Binary place value is
Example: Binary 101 =
in normal numbers.