怎么写罗马数字

罗马数字是古罗马使用的记数系统。它们使用拉丁字母的组合代表不同的数字。学会写罗马数字可以有助于写大纲，了解古罗马的文化，而且能让你的知识更渊博。下面的方法将使你快速掌握书写罗马数字的方法。

步骤

{"smallUrl":"https:\/\/www.zenmeban.com\/images_en\/thumb\/1\/11\/Learn-Roman-Numerals-Step-1-Version-2.jpg\/v4-460px-Learn-Roman-Numerals-Step-1-Version-2.jpg","bigUrl":"https:\/\/www.zenmeban.com\/images\/thumb\/1\/11\/Learn-Roman-Numerals-Step-1-Version-2.jpg\/v4-728px-Learn-Roman-Numerals-Step-1-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"} 1 了解基本符号。下面这些是你要知道的：^{[1]
X
研究来源}
- I = 1
- V = 5
- X = 10
- L = 50
- C = 100
- D = 500
- M = 1000
2 使用口诀记忆。如果你觉得这些字母对应的数字记起来很难，那么你可以背口诀，比如：My Dear Cat Loves Xtra Vitamins Intensely（我可爱的小猫很喜欢维生素X 。）
{"smallUrl":"https:\/\/www.zenmeban.com\/images_en\/thumb\/0\/02\/Learn-Roman-Numerals-Step-3-Version-2.jpg\/v4-460px-Learn-Roman-Numerals-Step-3-Version-2.jpg","bigUrl":"https:\/\/www.zenmeban.com\/images\/thumb\/0\/02\/Learn-Roman-Numerals-Step-3-Version-2.jpg\/v4-728px-Learn-Roman-Numerals-Step-3-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"} 3 所有的个位数字，如下：
- I = 1
- II = 2
- III = 3
- IV = 4
- V = 5
- VI = 6
- VII = 7
- VIII = 8
- IX = 9
{"smallUrl":"https:\/\/www.zenmeban.com\/images_en\/thumb\/5\/5e\/Learn-Roman-Numerals-Step-4-Version-2.jpg\/v4-460px-Learn-Roman-Numerals-Step-4-Version-2.jpg","bigUrl":"https:\/\/www.zenmeban.com\/images\/thumb\/5\/5e\/Learn-Roman-Numerals-Step-4-Version-2.jpg\/v4-728px-Learn-Roman-Numerals-Step-4-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"} 4 所有的十位数字，如下：
- X = 10
- XX = 20
- XXX = 30
- XL = 40
- L = 50
- LX = 60
- LXX = 70
- LXXX = 80
- XC = 90
{"smallUrl":"https:\/\/www.zenmeban.com\/images_en\/thumb\/e\/e2\/Learn-Roman-Numerals-Step-5-Version-2.jpg\/v4-460px-Learn-Roman-Numerals-Step-5-Version-2.jpg","bigUrl":"https:\/\/www.zenmeban.com\/images\/thumb\/e\/e2\/Learn-Roman-Numerals-Step-5-Version-2.jpg\/v4-728px-Learn-Roman-Numerals-Step-5-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"} 5 所有的百位数字，如下：
- C = 100
- CC = 200
- CCC = 300
- CD = 400
- D = 500
- DC = 600
- DCC = 700
- DCCC = 800
- CM = 900
{"smallUrl":"https:\/\/www.zenmeban.com\/images_en\/thumb\/1\/12\/Learn-Roman-Numerals-Step-6.jpg\/v4-460px-Learn-Roman-Numerals-Step-6.jpg","bigUrl":"https:\/\/www.zenmeban.com\/images\/thumb\/1\/12\/Learn-Roman-Numerals-Step-6.jpg\/v4-728px-Learn-Roman-Numerals-Step-6.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"} 6 连写的数字重复不得超过三次。相同的数字连写，所表示的数等于这些数字相加得到的数。通常，相同的数字最多重复三次。
- II = 2
- XXX = 30
{"smallUrl":"https:\/\/www.zenmeban.com\/images_en\/thumb\/d\/d0\/Learn-Roman-Numerals-Step-7.jpg\/v4-460px-Learn-Roman-Numerals-Step-7.jpg","bigUrl":"https:\/\/www.zenmeban.com\/images\/thumb\/d\/d0\/Learn-Roman-Numerals-Step-7.jpg\/v4-728px-Learn-Roman-Numerals-Step-7.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"} 7 小的数字在大的数字的右边，所表示的数等于这些数字相加得到的数。大数字一定是在小数字之前，这个规则才适用，比如：
- XI = 11
- MCL = 1150
{"smallUrl":"https:\/\/www.zenmeban.com\/images_en\/thumb\/5\/5e\/Learn-Roman-Numerals-Step-8.jpg\/v4-460px-Learn-Roman-Numerals-Step-8.jpg","bigUrl":"https:\/\/www.zenmeban.com\/images\/thumb\/5\/5e\/Learn-Roman-Numerals-Step-8.jpg\/v4-728px-Learn-Roman-Numerals-Step-8.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"} 8 小的数字在大的数字的左边，所表示的数等于大数减小数得到的数，比如：
- IV = 4
- CM = 900
{"smallUrl":"https:\/\/www.zenmeban.com\/images_en\/thumb\/6\/61\/Learn-Roman-Numerals-Step-9.jpg\/v4-460px-Learn-Roman-Numerals-Step-9.jpg","bigUrl":"https:\/\/www.zenmeban.com\/images\/thumb\/6\/61\/Learn-Roman-Numerals-Step-9.jpg\/v4-728px-Learn-Roman-Numerals-Step-9.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"} 9 书写组合数。罗马数字的组合规则有很多，比如：
- 用IV而不是IIII表示数字4
- 2987写作MMCMLXXXVII，因为：
  - 第一个M表示1000
  - 下一个M表示1000
  - 之后的CM表示900
  - 接下来的LXXX表示80
  - 最后的VII表示7
  - 因此，把所有的数字相加，就得到2987。
{"smallUrl":"https:\/\/www.zenmeban.com\/images_en\/thumb\/8\/84\/Learn-Roman-Numerals-Step-10.jpg\/v4-460px-Learn-Roman-Numerals-Step-10.jpg","bigUrl":"https:\/\/www.zenmeban.com\/images\/thumb\/8\/84\/Learn-Roman-Numerals-Step-10.jpg\/v4-728px-Learn-Roman-Numerals-Step-10.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"<div class=\"mw-parser-output\"><\/div>"} 10 书写大数。由于 M = 1,000，如果你想表示一百万，那么就在M上画一道横线。数字上面的横线代表把这个数字扩大一千倍，所以M x M= 1,000,000。
- MMMMM然后上方加一条横线代表五百万。这个规则十分重要，因为在罗马数字中，M就是最大的数字了。尽管并不常用，但最好还是知道这个规则。
11 检查。如果你想检验转换的结果是否正确，你可以在一些在线转换器中查看相应的结果。^{[2]
X
研究来源}