| Part of speech | unknown part of speech |
|---|
| Singular | Plural | |
|---|---|---|
| Nominative | aritmetika | aritmetikaj |
| Accusative | aritmetikan | aritmetikajn |
| Dutch | aritmetisch; rekenkundig |
|---|---|
| English | arithmetic; arithmetical |
| French | arithméthique |
| German | arithmetisch; zahlentheoretisch; Zahl‐; Zahlen‐ |
| Papiamento | aritmétiko |
| Portuguese | aritmético |
| Russian | арифметический |