→ Binary Adding
∴ Rules of binary adding:-
- 0+0= 0 sum of 0 with a carry of 0
- 0+1=1 sum of 1 with a carry of 0
- 1+0=1 sum of 1 with a carry of 0
- 1+1=0 sum of 0 with a carry of 1
→ How to convert decimal into binary:

Convert the remaining by yourself.
Conversion Table
Decimal Number | Binary Equivalent |
0 | 0 0 0 0 |
1 | 0 0 0 1 |
2 | 0 0 1 0 |
3 | 0 0 1 1 |
4 | 0 1 0 0 |
5 | 0 1 0 1 |
6 | 0 1 1 0 |
7 | 0 1 1 1 |
8 | 1 0 0 0 |
9 | 1 0 0 1 |
10 | 1 0 1 0 |
11 | 1 0 1 1 |
12 | 1 1 0 0 |
13 | 1 1 0 1 |
14 | 1 1 1 0 |
15 | 1 1 1 1 |
→ Binary subtraction:-
• Rules of binary subtraction:-
- 0-0= 0
- 1-1= 0
- 1-0= 1
- 0-1= 1 with a borrow of 1
Note:-In binary 10-1=1, not 9