anzan
1. mental arithmetic
Noun
#53115
1. mental arithmetic
1. Probably mental calculation.; Likely a rough estimate.
1. Probably a mental calculation.; Likely estimated.
1. If/when calculating in one's head; If/when mental calculation
1. Was mental calculation.; Was calculated in one's head.
1. If it were mental calculation; If calculating mentally
1. Wasn't mental calculation.; Wasn't calculating in one's head.
1. It's not mental calculation.; It's not done in one's head.
1. Mental calculation; Calculated
1. Was not mental calculation.; Was not done in one's head.