 |
| |||
| do figures in one's head | |||
| calculate by heart | |||
| count in head; do mental arithmetic; do sums on one's head (о школьнике) | |||
| считать в уме: 2 phrases in 2 subjects |
| Chess | 1 |
| Rhetoric | 1 |
|
| |||
| do figures in one's head | |||
| calculate by heart | |||
| count in head; do mental arithmetic; do sums on one's head (о школьнике) | |||
| считать в уме: 2 phrases in 2 subjects |
| Chess | 1 |
| Rhetoric | 1 |