默算

mòsuàn

默算 — mòsuàn

1. mental arithmetic; doing calculations in one's head

   他小时候就很擅长默算。 tā xiǎoshíhòu jiù hěn shàncháng mòsuàn — He was good at mental arithmetic from a young age.

2. to calculate mentally; to work out (something) in one's head

   请你在心里默算答案，不要用计算器。 qǐng nǐ zài xīnlǐ mòsuàn dáàn búyào yòng jìsuànqì — Please work out the answer in your head; don't use a calculator.