英语词汇mental arithmetic怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	mental arithmetic
释义	ˌmental aˈrithmeticnoun [u] adding, multiplying, etc numbers in your mind without writing anything down or using a calculator 心算
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英汉双解词典收录171353条英汉汉英双解翻译词条，基本涵盖了全部常用单词的读音、翻译及用法，是英语学习的有利工具。