命丧与她丶
单数 odd number 双数 even number英[ˈi:vən ˈnʌmbə] 美[ˈivən ˈnʌmbɚ] [词典] 偶数; [例句]One more than any odd number is an even number.比任何一个奇数大一的数是偶数。
芒果布丁sweet
odd表示奇数,even表示偶数。
odd是英文缩写,也可以用2n+1或者2n-1来表示奇数,而用2n来表示偶数。
奇数的定义性质:
奇数(odd)指不能被2整除的整数 ,数学表达形式为:2k+1, 奇数可以分为正奇数和负奇数。
关于奇数和偶数,有下面的性质:
1、两个连续整数中必有一个奇数和一个偶数。
2、奇数+奇数=偶数;偶数+奇数=奇数;偶数+偶数+...+偶数=偶数。
3、奇数-奇数=偶数;偶数-奇数=奇数;奇数-偶数=奇数。
4、若a、b为整数,则a+b与a-b有相同的奇偶性,即a+b与a-b同为奇数或同为偶数。
5、n个奇数的乘积是奇数,n个偶数的乘积是偶数;算式中有一个是偶数,则乘积是偶数。
6、奇数的个位是1、3、5、7、9;偶数的个位是0、2、4、6、8。
7、奇数的平方除以2、4、8余1。
8、任意两个奇数的平方差是2、4、8的倍数。
9、奇数除以2余数为1。
氷之世界
双数英文是even numbers。
例句:
1、热菜为主,一般为双数,如4个、6个、8个。
Hot dishes are the main courses,usually there are even numbers of hot dishes, 4, 6 or 8.
2、只要你准备的彩礼单是双数,这就是尊敬新娘家的表现。
As long as you present some of the gifts on the list in even numbers, it is a wonderful gesture that shows respect to the bride's family.
3、所有的礼物都是双数,意指“喜上加喜”。
All gifts should come in even numbers, meaning "good things double" .
4、那段时期,北京强制推行了严苛得多的规定,要求车辆按车牌尾号单双数隔日限行,使得路上跑的汽车减少了将近200万辆。
During that period, the city enforced a much tougher measure that called for alternate driving days for cars with evenand oddnumbered license platesand took almost two million cars off the road.
5、方法任选60例中风急性期患者(全部经CT或MR确诊),将住院号为双数者列为观察组,住院号为单数者列为对照组,每组30例。
Methods 60 cases with acute heart stroke, all affirmatively diagnosed by CT or MR, were randomly divided into groups according to their registration numbers: 30 with odd number as observational group and the other 30 with even number as control group.
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