He got the answer by mental arithmetic.

他用心算得出了答案.

《现代英汉综合大词典》

Gavin has the capacity to add numbers quickly in his head.

盖文能很快地做心算加法.

辞典例句

The boy is good at doing a sum in his head.

这男孩善于心算.

辞典例句

He is good at mental arithmetic.

他擅长心算.

辞典例句

He could calculate percentages mentally at high speed.

他心算速度极快,能很快算出利润金额.

辞典例句

He added the numbers mentally; he did not need a pencil and paper.

他心算数字, 不需要纸和笔.

辞典例句

I know all about the budget authorization, and I can count heads : you're one vote short.

我知道所有的预算授权书我可以心算出: 你只有弱弱的一票.

电影对白

He has a high mentality and can calculate these figures mentally.

他的智商高,可以心算这些数字.

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The development of pupils " mental arithmetic was studied in this article. "

本论文深入研究了小学生 心算 能力的发展规律.

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And the circuit for moving eyes left does mental subtraction.

而控制眼球左转的脑回路同时也负责心算减法.

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I am strong in calculating things mentally.

我很擅长心算.

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Can you do simple sum in your head?

你能做简单的心算 吗 ?

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This paper discussed the effect of relaxation training on cardiovascular reactivity and mental arithmetic achievement.

本实验目的在于探讨放松训练对正常状态和心算应激时心率、T波幅度的影响.

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Researches attached more and more importance to the relationship between mental arithmetic development and working memory.

国内外的许多学者越来越重视儿童心算能力发展与工作记忆关系的研究.

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Moreover, the procedures of code, retrieve and selecting strategy are influenced by mathematics anxiety.

此外, 数学焦虑还影响着心算的编码 、 提取以及策略选择等过程.

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