如何表示四则运算

同学们读了这篇文章，会感到用英语表示四则运算并不难。大家学了以后，可以自己练习，也可以两人互练。

四则运算包括加法、减法、乘法和除法。“做算术”是do sums.

1. 加法 (addition) 与加法相关的词汇有：加数(addend), 加号(plus sign/plus) 与和数/和(sum)。表示“加”，可以用动词add,介词plus,和连词and。常见的表达方法有：

1) 8+2 = ? 八加二得/等于多少？

a. What' s eight plus two?

b. How much is eight plus two?

2) 8 + 2 = 10 八加二得/等于十。

a. Eight plus two is/makes ten.

b. Eight and two is/makes ten.

c. Eight plus two is equal to ten.

d. Eight plus two equals ten.

e. If you add eight and/to two, you get ten.

f. Add eight and/to two, and you' 11 get ten.

3) 8 + 2 = ? 八加二的和是多少？

What' s the sum of eight and two?

4) 8+2= 10 八加二的和为十。

The sum of eight and two is ten.

5)那里需要有个加号。

You need a plus sign/plus there.

6)那里应该有个加号。

There should be a plus sign/plus there.

2. 减法 (subtraction) 与减法相关的词汇有：减数 (subtrahend). 减号 (minus sign/minus)与数/差(difference)。 表示“减”，可以用动词subtract... from, 和介词minus, from。常见的表达方法有：

1) 8-2=?八减二得／等于多少？

a. What' s eight minus two?

b. How much is eight minus two?

2) 8 - 2=6 八减二得/等于/剩/余六。

a. Eight minus two is/makes six.

b. Two subtracted from eight is six.

c. Two from eight is six.

d. Eight minus two is equal to six.

e. Eight minus two equals/leaves six.

f. If you subtract two from eight, you get six.

g. Subtract two from eight, and you' 11 get six.

3) 8 - 2 = ? 八减二的差是多少？

What's the difference between eight and two?

4) 8 - 2 = 6 八减二的差是六。

The difference between eight and two is six.

5)那里需要有个减号。

You need a minus sign/minus there.

6)那里应该有个减号。

There should be a minus sign/minus there.

3. 乘法（multiplication）与乘法相关的词汇有：乘数(multiplier)、乘号(muitiplication sign)与乘积/积(product)。表示“乘以”，可以用动词multiply... by, 和介词by， times。常见的表达方法有：

1) 8×2=?八乘以二得／等于多少？

a. What' s eight by two'?

b. How much is eight by two？

2） 8×2 = 16 八乘以二得/等于十六。

a. Eight by two is/makes sixteen.

b. Eight times two is/makes sixteen.

c. Eight times two is equal to sixteen.

d. Eight times two equals sixteen.

e. Eight times two, that' s sixteen.

f. Eight muhiplied by two is sixteen.

g. Eight multiplied by two is equal to sixteen.

h. Eight multiplied by two equals sixteen.

i. Ifyou multiply eight by two, you get sixteen.

j. Multiply eight by two, and you'll get sixteen.

３）8×2=?八乘以二的积是多少？

What' s the product of eight and two?

4)8×2=16八乘以二的积是十六。

The product of eight and two is sixteen.

4. 除法(division) 与除法相关的词汇有：除数 (divisor), 除号(division sign) 与商数/商(quotient)。表示“除以”，可以用动词divide...by; 表示“以……除 ”, 可以用动词divide...into, go...into。常见的表达方法有:

1) 8÷2 = ? 八除以二得/等于多少？

a. What' s eight divided by two?

b. How much is eight divided by two?

2) 8÷2 =4 八除以二得/等于四。

a. Eight divided by two is/makes four.

b. Eight divided by two is equal to four.

c. Eight divided by two equals four.

d. If you divide eight by two, you get four.

e. Divide eight by two, and you' 11 get four.

3) 8÷2 = ? 以二除八得多少？

a. What' s two dividing into eight?

b. What' s two into eight?

4) 8÷2 = 4以二除八得四。

a. Two divides into eight four times.

b. If you divide two into eight, you get four.

c. Divide two into eight, and you' 11 get four.

d. Two goes into eight four times.

5) 8÷2=? 八除以二的商是多少？

What' s the quotient of eight divided by two?

6) 8 ÷2 = 4八除以二的商是四。

The quotient of eight divided by two is four.

7)以3除10。除不尽。

Three into ten won' t go.

8）任何奇数都不能被2除尽。

Any odd number is indivisible by two.