Base 20 Addition Table
In mathematics, a base N addition table defines the addition operation for numbers written in a base-20 number system. This page shows the base 20 addition table — every row header, column header, and sum below is written in base 20, not decimal. Print it directly from the page using the print button on the table.
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Base 20 Addition Table
Base 20 Addition Table
| + | 020 | 120 | 220 | 320 | 420 | 520 | 620 | 720 | 820 | 920 | A20 | B20 | C20 | D20 | E20 | F20 | G20 | H20 | I20 | J20 | 1020 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 020 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | A | B | C | D | E | F | G | H | I | J | 10 |
| 120 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | A | B | C | D | E | F | G | H | I | J | 10 | 11 |
| 220 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | A | B | C | D | E | F | G | H | I | J | 10 | 11 | 12 |
| 320 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | A | B | C | D | E | F | G | H | I | J | 10 | 11 | 12 | 13 |
| 420 | 4 | 5 | 6 | 7 | 8 | 9 | A | B | C | D | E | F | G | H | I | J | 10 | 11 | 12 | 13 | 14 |
| 520 | 5 | 6 | 7 | 8 | 9 | A | B | C | D | E | F | G | H | I | J | 10 | 11 | 12 | 13 | 14 | 15 |
| 620 | 6 | 7 | 8 | 9 | A | B | C | D | E | F | G | H | I | J | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| 720 | 7 | 8 | 9 | A | B | C | D | E | F | G | H | I | J | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 |
| 820 | 8 | 9 | A | B | C | D | E | F | G | H | I | J | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| 920 | 9 | A | B | C | D | E | F | G | H | I | J | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 |
| A20 | A | B | C | D | E | F | G | H | I | J | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 1A |
| B20 | B | C | D | E | F | G | H | I | J | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 1A | 1B |
| C20 | C | D | E | F | G | H | I | J | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 1A | 1B | 1C |
| D20 | D | E | F | G | H | I | J | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 1A | 1B | 1C | 1D |
| E20 | E | F | G | H | I | J | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 1A | 1B | 1C | 1D | 1E |
| F20 | F | G | H | I | J | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 1A | 1B | 1C | 1D | 1E | 1F |
| G20 | G | H | I | J | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 1A | 1B | 1C | 1D | 1E | 1F | 1G |
| H20 | H | I | J | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 1A | 1B | 1C | 1D | 1E | 1F | 1G | 1H |
| I20 | I | J | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 1A | 1B | 1C | 1D | 1E | 1F | 1G | 1H | 1I |
| J20 | J | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 1A | 1B | 1C | 1D | 1E | 1F | 1G | 1H | 1I | 1J |
| 1020 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 1A | 1B | 1C | 1D | 1E | 1F | 1G | 1H | 1I | 1J | 20 |
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