Base 18 Addition Table
In mathematics, a base N addition table defines the addition operation for numbers written in a base-18 number system. This page shows the base 18 addition table — every row header, column header, and sum below is written in base 18, not decimal. Print it directly from the page using the print button on the table.
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Base 18 Addition Table
Base 18 Addition Table
| + | 018 | 118 | 218 | 318 | 418 | 518 | 618 | 718 | 818 | 918 | A18 | B18 | C18 | D18 | E18 | F18 | G18 | H18 | 1018 | 1118 | 1218 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 018 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | A | B | C | D | E | F | G | H | 10 | 11 | 12 |
| 118 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | A | B | C | D | E | F | G | H | 10 | 11 | 12 | 13 |
| 218 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | A | B | C | D | E | F | G | H | 10 | 11 | 12 | 13 | 14 |
| 318 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | A | B | C | D | E | F | G | H | 10 | 11 | 12 | 13 | 14 | 15 |
| 418 | 4 | 5 | 6 | 7 | 8 | 9 | A | B | C | D | E | F | G | H | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| 518 | 5 | 6 | 7 | 8 | 9 | A | B | C | D | E | F | G | H | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 |
| 618 | 6 | 7 | 8 | 9 | A | B | C | D | E | F | G | H | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| 718 | 7 | 8 | 9 | A | B | C | D | E | F | G | H | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 |
| 818 | 8 | 9 | A | B | C | D | E | F | G | H | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 1A |
| 918 | 9 | A | B | C | D | E | F | G | H | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 1A | 1B |
| A18 | A | B | C | D | E | F | G | H | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 1A | 1B | 1C |
| B18 | B | C | D | E | F | G | H | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 1A | 1B | 1C | 1D |
| C18 | C | D | E | F | G | H | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 1A | 1B | 1C | 1D | 1E |
| D18 | D | E | F | G | H | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 1A | 1B | 1C | 1D | 1E | 1F |
| E18 | E | F | G | H | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 1A | 1B | 1C | 1D | 1E | 1F | 1G |
| F18 | F | G | H | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 1A | 1B | 1C | 1D | 1E | 1F | 1G | 1H |
| G18 | G | H | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 1A | 1B | 1C | 1D | 1E | 1F | 1G | 1H | 20 |
| H18 | H | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 1A | 1B | 1C | 1D | 1E | 1F | 1G | 1H | 20 | 21 |
| 1018 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 1A | 1B | 1C | 1D | 1E | 1F | 1G | 1H | 20 | 21 | 22 |
| 1118 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 1A | 1B | 1C | 1D | 1E | 1F | 1G | 1H | 20 | 21 | 22 | 23 |
| 1218 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 1A | 1B | 1C | 1D | 1E | 1F | 1G | 1H | 20 | 21 | 22 | 23 | 24 |
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