| Answer | Crossword Clue |
|---|---|
| MENTAL | Kind of arithmetic. |
| GAUSS | German inventor of modular arithmetic |
| IMPROVEDIVISION | End of the arithmetic advice |
| YOURGLASSESWILL | Middle of some arithmetic advice |
| IFYOUMUSTDOMATH | Part one of some insightful arithmetic advice |
| ANS | Figure in back of an arithmetic book: Abbr. |
| NINE | The sum of the digits of any multiple of ... is a multiple of ... (arithmetic curiosity) |
