| 单词 | digital root |
| 释义 | > as lemmasdigital root digital root n. Mathematics the digit obtained when all the digits of a number are added and the process is repeated on successive results until the outcome is a single digit. ΘΚΠ the world > relative properties > number > mathematical number or quantity > [noun] > produced in a certain way > other residue class1904 digital root1917 1917 H. E. Dudeney Amusements in Math. 157/1 If you add together the digits of any number and then, as often as necessary, add the digits of the result, you must ultimately get a number composed of one figure. This last number I call the ‘digital root’. 1951 Amer. Math. Monthly 58 205 Club reports... Digital roots and The casting out of nines, by Donald Walsh. 1973 Sci. Amer. Dec. 120/1 One way to do it makes use of the old accountant's trick for checking addition by digital roots. 2004 Amer. Math. Monthly 111 628 (heading) Digital Roots of Fibonacci numbers. < as lemmas |
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