﻿ ﻿﻿﻿ 分数、小数、百分数、+ – × / | 玄数
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## 分数、小数、百分数、+ – × /

2015-05-16

### 一、分数 Fraction

 1 — X 分子用 a（one），分母用X的序数词 1 — 2 a half 1 — 4 a quarter 1 —— 100 a（one）hundredth

 A — B （A > 1）—— 分子A用基数词，分母B用序数词再 + s ，整数 and 分数 2 — 3 two thirds 4 — 5 four fifths 5 2 — 7 five and two sevens

### 二、小数 Decimal

0.1 —— zero point one

123.123 —— one hundred and twenty-three point one two three

### 三、 百分数 Percentage

% —— percent ：

5% —— five percent

0.123 %—— zero point one two three percent

### 四、 + – × /

1. +  plus / add ：2 + 10 = ？ 2 + 10 = 12

How much is two plus ten?
Two plus ten is twelve.

2.  –  minus ： 8 – 5 = ？  8 – 5 = 3

How much is eight minus five?
Eight minus five is three.

3.  ×  times / mutiplied by ： 2 × 3 = ？  2 × 3 = 6

How much is two times three.?
Two times three is six.

4.  / divided by ： 10 / 4 = ？ 10 / 4 = 2.5

How much is ten divided by four?
Ten divided by four is two point five.

 * 基数词、序数词 * 时间、日期 * 倍数

 A. one thirds, two thirds B. one third, two third C. one third, two the thirds D. one third, two thirds

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