英语语法视频教程-数词的加减乘除

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数词之加减乘除


算术式的读法：

※加法

1.在口语中的小数目的加法：用and代表“＋”号，is或are 代表“?

号。如：

Five and three is (or are) eight.

5 + 3 = 8

What’s seven and eight?

7 + 8 = ?

2.大数目的加法，或在比较正式的场合──用plus代表“＋”号，

equals或is代表“?”号。如：

What does Two hundred and thirty-one plus a hundred and

sixty-three equal?

(or: What is Two hundred and thirty-one plus a hundred and

sixty-three?)

231 +163 = ?

※减法

1.在口语中的小数目的减法──可用以下两种方式 ：

方法一：被减数＋take away＋减数＋leaves (or is) ＋余数

方法二：减数＋from＋被减数＋leaves (or is) ＋余数

Four from nine leaves (or is) five.

or: Nine take away four leaves (or is) five.

9 - 4 = 5.

2.大数目的减法或在比较正式的场合──用minus代表“－” 号，

equals代表“?”号。如：

Four hundred and thirty-one minus a hundred and sixty-three

equals two hundred and sixty-eight, right or wrong?

431 - 163 = 268

※乘法

1.口语中小数目的乘法──第二个数目用复数形，等号用are 表示。

如：

What are three tens?

3 &#x D7;10 = ?

Five eights are forty.

5 &#x D7;8 = 40

2.大数目的乘法用times代表“&#x D7;”号，is或makes代表“=”号；在比较

正式的场合用multiplied by代表“&#x D7;”号，equals代表“?”号。如：

What does fifteen times two hundred and sixty-nine make?

(or : What is fifteen times two hundred and sixty-nine?)

15 &#x D7;269 = ?

15 &#x D7;289 = 4335

15 multiplied by 289 equals 4335.

※除法

1.小数目的除法有两种方式：

方法一：用divided by 代表“&#x F7;”号，equals代表“?”号。

方法二：除数＋into＋被除数＋goes＋余数──用于会话中。

Three into eighteen goes five.

or: Eighteen divided by three equals five.

18 &#x F7;3 = 5.

2.大数目的除法同方法一。

What does six hundred and sixty-seven divided by twenty-three

equal?

667 &#x F7;23 = ?