单词	rational number
释义	Rational Number A number that can be made by dividing two integers (an integer is a number with no fractional part). The word comes from "ratio". Examples: • 1/2 is a rational number (1 divided by 2, or the ratio of 1 to 2) • 0.75 is a rational number (3/4) • 1 is a rational number (1/1) • 2 is a rational number (2/1) • 2.12 is a rational number (212/100) • −6.6 is a rational number (−66/10) • etc But π (pi) is not a rational number, it is an "Irrational Number". See: Irrational Number
随便看	diagonal diagram diameter diamond dice die difference difference of squares difference quotient differential equation differentiation digit digital digital clock or watch digital root dilation dimension dimensions dipyramid directed number direction directrix discount discrete data discriminant

数学辞典收录了1200条数学词条，基本涵盖了常用数学知识及数学英语单词词组的翻译及用法，是数学学习的有利工具。