| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | addition | Japan | Enhanced mental math skills valued and fostered through abacus training | 1 |
| 2 | addition | Japan | Taught using the abacus as a traditional method of calculation | 1 |
| 3 | addition | Japan | Emphasized in abacus training for mental calculation skills | 1 |
| 4 | addition | Japan | Part of an early education focus on mental math and speed calculations | 1 |