| Off | On |
| 0 | 1 |
| Decimal | Binary |
| 0 | 0 |
| 1 | 1 |
| 2 | 10 |
| 3 | 11 |
| 4 | 100 |
| 5 | 101 |
| 6 | 110 |
| 7 | 111 |
| 8 | 1000 |
Convert Binary to Decimal:
|
Decimal
|
The key for addition:
| 0
+ 0 0 |
1
+ 0 1 |
0
+ 1 1 |
1
+ 1 10 |
1
1 + 1 11 |
The key for multiplication:
| 0
× 0 0 |
1
× 0 0 |
0
× 1 0 |
1
× 1 1 |
Convert Decimal to Binary:
Example:
34 ÷ 2 = 17, R= 0
17 ÷ 2 = 8, R= 1
8 ÷ 2 = 4, R= 0
4 ÷ 2 = 2, R= 0
2 ÷ 2 = 1, R= 0
Start last quotion 1 then bottom up
the remainders.
3410 = 1000102