| 单词 | mental arithmetic |
| 释义 | > as lemmasmental arithmetic mental arithmetic n. arithmetic performed entirely in the head, without recourse to written figures or calculating aids. ΘΚΠ the world > relative properties > number > arithmetic > [noun] > kinds of decimal arithmetic1608 disme1608 decimal1623 vulgar arithmetic1653 logistic1656 figurate arithmetic1666 rhabdology1667 mental arithmetic1766 binary arithmetic1796 1766 H. Brooke Fool of Quality I. vii. 260 I cast up, in a pleasing kind of mental arithmetic, how much my weekly twenty guineas would amount to at the year's end. 1838 Jrnl. Statist. Soc. 1 307 Reading, writing on slates, and mental arithmetic, are taught in classes, with moral duties, and the Scriptures. 1889 W. C. Brownell French Traits iii. 98 The French intelligence seems to have almost no frivolous side. The different varieties of mental arithmetic, guessing-games, puzzles, puns, spiritualism, theosophy, fanaticisms, have no attractions for it. 1935 C. L. Burt Subnormal Mind i. 41 The reading test and the mental arithmetic test..will yield a fair estimate of the child's educational level. 1990 Times Educ. Suppl. 5 Oct. (Review section) 20 Does a reliance on mathematical aids mean mental arithmetic suffers? < as lemmas |
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