兆通常係指1,0000,0000,0000,即係9999,9999,9999同1,0000,0000,0001之間嘅自然數,用指數記數法就係1×10¹²。
兆除咗用來指「一萬個億」,亦可以指「一百個萬」(106)或者「一億個億」(1016)。
中文
佢係大數,1012嘅中文寫法一億萬、一萬億、一萬萬萬或者萬萬萬,或者用黃帝之法來寫,上數係百兆,中數係千兆,下數係澗[1]。
參考
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