Le cifre sono 2: 0 e 1
La base delle potenze è 2
+----+------+ +----+---------+
| n | 2^n | | n | 2^n |
+----+------+ +----+---------+
| 0 | 1 | | 11 | 2048 |
| 1 | 2 | | 12 | 4096 |
| 2 | 4 | | 13 | 8192 |
| 3 | 8 | | 14 | 16384 |
| 4 | 16 | | 15 | 32768 |
| 5 | 32 | | 16 | 65536 |
| 6 | 64 | | 17 | 131072 |
| 7 | 128 | | 18 | 262144 |
| 8 | 256 | | 19 | 524288 |
| 9 | 512 | | 20 | 1048576 |
| 10 | 1024 | | .. | ... |
+----+------+ +----+---------+
Contare in base 2
+----+--------+ +----+--------+ +----+--------+ +----+--------+
| 10 | 2 | | 10 | 2 | | 10 | 2 | | 10 | 2 |
+----+--------+ +----+--------+ +----+--------+ +----+--------+
| 0 | 000000 | | 16 | 010000 | | 32 | 100000 | | 48 | 110000 |
| 1 | 000001 | | 17 | 010001 | | 33 | 100001 | | 49 | 110001 |
| 2 | 000010 | | 18 | 010010 | | 34 | 100010 | | 50 | 110010 |
| 3 | 000011 | | 19 | 010011 | | 35 | 100011 | | 51 | 110011 |
| 4 | 000100 | | 20 | 010100 | | 36 | 100100 | | 52 | 110100 |
| 5 | 000101 | | 21 | 010101 | | 37 | 100101 | | 53 | 110101 |
| 6 | 000110 | | 22 | 010110 | | 38 | 100110 | | 54 | 110110 |
| 7 | 000111 | | 23 | 010111 | | 39 | 100111 | | 55 | 110111 |
| 8 | 001000 | | 24 | 011000 | | 40 | 101000 | | 56 | 111000 |
| 9 | 001001 | | 25 | 011001 | | 41 | 101001 | | 57 | 111001 |
| 10 | 001010 | | 26 | 011010 | | 42 | 101010 | | 58 | 111010 |
| 11 | 001011 | | 27 | 011011 | | 43 | 101011 | | 59 | 111011 |
| 12 | 001100 | | 28 | 011100 | | 44 | 101100 | | 60 | 111100 |
| 13 | 001101 | | 29 | 011101 | | 45 | 101101 | | 61 | 111101 |
| 14 | 001110 | | 30 | 011110 | | 46 | 101110 | | 62 | 111110 |
| 15 | 001111 | | 31 | 011111 | | 47 | 101111 | | 63 | 111111 |
+----+--------+ +----+--------+ +----+--------+ +----+--------+
(101)2 = (?)10
= 1·22 + 0·21 + 1·20
= 1·4 + 0·2 + 1·1
= 4 + 0 + 1
= (5)10
(1101)2 = (?)10
= 1·23 + 1·22 + 0·21 + 1·20
= 1·8 + 1·4 + 0·2 + 1·1
= 8 + 4 + 0 + 1
= (13)10
(100)10 = (?)2
(100)10 = (1100100)2
(250)10 = (?)2
(250)10 = (11111010)2
Foglio di calcolo
In ordine alfabetico
- BASE(250; 2) -> 11111010
- BASE(250; 2; 16) -> 0000000011111010
- BINARIO.DECIMALE(11111010) -> 250
- DECIMALE(11111010; 2) -> 250
- DECIMALE.BINARIO(250) -> 11111010
- DECIMALE.BINARIO(250; 16) -> 0000000011111010