Read Edit View history 默算 mòsuàn mental arithmetic Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 默算 · mòsuàn · mental arithmetic 2026/03/04 默算 mòsuàn mental arithmetic to perform mathematical calculations in one's mind without writing them down 他不需要计算器，直接通过默算就得出了答案。 verb created sense Mar 4, 2026, 02:25 AM