| 词汇 | mental arithmetic |
| 释义 | mental arithmeticˌmental aˈrithmetic noun [uncountableU] HMNthe act of adding numbers together, multiplying them etc in your mind, without writing them down 心算 I did a quick bit of mental arithmetic. 我很快地心算了一下。 Examples from the Corpus mental arithmetic• A quick bit of mental arithmetic was enough to make Chrissy weak at the knees. |
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