加、减、乘、除的表达法和读法

1、加法算式-数字+plus/and+数字+is/are/equal(s)/make(s)+得数 （谓语动词用单复数皆可）

3+12=15 Three and/plus twelve is/are fifteen.

2、减法算式-被减数+minus+减数+is/equals/leaves+得数 （谓语动词必须用单数）

16-8=8 sixteen minus eight is eight.

Ten minus five is five. 10减5等于五。

1、 乘法算式

被乘数+times+乘数+is/are/equal(s)/make(s)+得数

被乘数+multiplied by +乘数+is/are/makes/make+得数

3*6=18 three times six is /are eighteen.（乘法算式做主语时，句中的谓语用单复数均可）

Three multiplied by five e makes/make eighteen.

Twenty-three times two is forty-six. 23乘以2等于46.

2、 除法算式 （除法算式中谓语动词只能用单数）

被除数+divided by+除数+is/gives/equal(s)/make(s)/goes+得数(+and+余数+over)

除数+into+被除数+is/goes+得数(+and+余数+over)

20/5=4 twenty divided by five is/gives four.=Five into twenty is/goes four.

How much is one hundred divided by ten?100除以10等于多少？

编号的表达法

表示事物编号时，常用基数词，有时也可用序数词。用基数词表示时，要将基数词放在被修饰词后；用序数词表示时，要将序数词放在被说明的名词前。即“名词+基数词（首写字母常大写）”或”the+序数词+名词”

第六册-Book Six=the Sixth Book

第九课-Lesson Nine=the Ninth Lesson

三班-Class Three=the Third Class