| Kopfrechnen | mental arithmetic |
| Kopflehne | headrest |
| Köpfchen | brain head |
| aufrechnen | charge up count up reckon up acculumulate add |
| hochrechnen | project |
| Kopfnicken | nod |
| kopfscheu | timid |
| Zöpfchen | pigtail |
| Töpfchen | potty |
| Klapprechner | laptop |
| Rechnen | computation |
| rechnen | calculate reckon work out compute expect anticipate estimate |
| anrechnen | impute |
| zurechnen | impute |
| Sprechen | speaking |
| sprechen | speak talk propose |
| ausrechnen | calculate work out for oneself |
| berechnen | calculate charge |
| errechnen | calculate work out |
| losbrechen | break off break break out |