Le cifre sono 16: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F
La base delle potenze è 16 (HEXadecimal, H)
+---+------+ +---+---------+
| n | 16^n | | n | 16^n |
+---+------+ +---+---------+
| 0 | 1 | | 3 | 4096 |
| 1 | 16 | | 4 | 65536 |
| 2 | 256 | | 5 | 1048576 |
+---+------+ +---+---------+
Contare in base 16
+----+----+ +----+----+ +----+----+ +----+----+ +----+----+ +----+----+
| 10 | 16 | | 10 | 16 | | 10 | 16 | | 10 | 16 | | 10 | 16 | | 10 | 16 |
+----+----+ +----+----+ +----+----+ +----+----+ +----+----+ +----+----+
| 0 | 00 | | 16 | 10 | | 32 | 20 | | 48 | 30 | | 64 | 40 | | 80 | 50 |
| 1 | 01 | | 17 | 11 | | 33 | 21 | | 49 | 31 | | 65 | 41 | | 81 | 51 |
| 2 | 02 | | 18 | 12 | | 34 | 22 | | 50 | 32 | | 66 | 42 | | 82 | 52 |
| 3 | 03 | | 19 | 13 | | 35 | 23 | | 51 | 33 | | 67 | 43 | | 83 | 53 |
| 4 | 04 | | 20 | 14 | | 36 | 24 | | 52 | 34 | | 68 | 44 | | 84 | 54 |
| 5 | 05 | | 21 | 15 | | 37 | 25 | | 53 | 35 | | 69 | 45 | | 85 | 55 |
| 6 | 06 | | 22 | 16 | | 38 | 26 | | 54 | 36 | | 70 | 46 | | 86 | 56 |
| 7 | 07 | | 23 | 17 | | 39 | 27 | | 55 | 37 | | 71 | 47 | | 87 | 57 |
| 8 | 08 | | 24 | 18 | | 40 | 28 | | 56 | 38 | | 72 | 48 | | 88 | 58 |
| 9 | 09 | | 25 | 19 | | 41 | 29 | | 57 | 39 | | 73 | 49 | | 89 | 59 |
| 10 | 0A | | 26 | 1A | | 42 | 2A | | 58 | 3A | | 74 | 4A | | 90 | 5A |
| 11 | 0B | | 27 | 1B | | 43 | 2B | | 59 | 3B | | 75 | 4B | | 91 | 5B |
| 12 | 0C | | 28 | 1C | | 44 | 2C | | 60 | 3C | | 76 | 4C | | 92 | 5C |
| 13 | 0D | | 29 | 1D | | 45 | 2D | | 61 | 3D | | 77 | 4D | | 93 | 5D |
| 14 | 0E | | 30 | 1E | | 46 | 2E | | 62 | 3E | | 78 | 4E | | 94 | 5E |
| 15 | 0F | | 31 | 1F | | 47 | 2F | | 63 | 3F | | 79 | 4F | | 95 | 5F |
+----+----+ +----+----+ +----+----+ +----+----+ +----+----+ +----+----+
(101)H = (?)10
= 1·162 + 0·161 + 1·160
= 1·256 + 0·16 + 1·1
= 256 + 0 + 1
= (257)10
(5B6)H = (?)10
= 5·162 + [B]·161 + 6·160
= 5·256 + 11·16 + 6·1
= 1280 + 176 + 6
= (1462)10
(100)10 = (?)H
+--------+---+---+
| N:16 | Q | R |
+--------+---+---+
| 100:16 | 6 | 4 |
| 6:16 | 0 | 6 |
+--------+---+---+
(100)10 = (64)H
(250)10 = (?)H
+--------+----+----+----+
| N:16 | Q | R | R' |
+--------+----+----+----+
| 250:16 | 15 | 10 | A |
| 15:16 | 0 | 15 | F |
+--------+----+----+----+
(250)10 = (FA)H
Foglio di calcolo
In ordine alfabetico
- BASE(250; 16) -> FA
- BASE(250; 16; 4) -> 00FA
- DECIMALE(“FA”; 16) -> 250
- DECIMALE.HEX(250) -> FA
- DECIMALE.HEX(250; 4) -> 00FA
- HEX.DECIMALE(“FA”) -> 25