1. 2英语怎么写 1+1=2 one plus one is two
2/2=1 two divided by two is one
1*3=3 one multiply three is three
3-1=2 three minus one is two
（摘自《魔法英语语法》）
一、加法
“加”用plus,and或add表示；“等于”用is,make,equal等词表示 。
1 + 1 = ？可表示为：How much is one plus two?
1 + 2 = 3 可表示为：
One plus two is three.
One and two is equal to three.
One and two make(s) three.
One added to two equals three.
If we add one to / and to, we get three.
二、减法
“减”用minus或take from表示 。
9 - 3 = ？可表示为：How much is nine minus three?
9 - 3 = 6 可表示为：
Nine minus three is six.
Take three from nine and the remainder is six.
Three (taken) from nine is six.
三、乘法
“乘”可用time（动词）或multiply表示 。
2 * 3 = ？可表示为：How much is two times three?
2 * 3 = 6 可表示为：
Two times three is six.
Multiply two by three, we get six.
Two multipied by three makes six.
四、除法
“除”用divide的过去分词形式表示 。
15 ÷ 3 = ？可表示为：How much is fifteen divided by three?
15 ÷ 3 = 5 可表示为：
Fifteen divided by three is five.
Fifteen divided by three equals / gives / makes five.
五、其他算式的写法和读法
1:2 读作 the ratio of one to two
15:3 = 5 读作 The ratio of fifteen to three equals five.
3的平方 读作 three squared
2的立方 = 8 读作 Two cubed is eight.
X的四次方 = Y 读作 The fourth power of X is Y.
4开平方 = 2 读作 The square root of four is two.
8开立方 = 2 读作 The cubic root of eight is two.
2. 1 1-20的英语（基数词）写法：
1、one;2、two;3、three;4、four;5 、five;6 、six;7 、seven;8 、eight;9 、nine;10、ten;
11、eleven;12 、twelve;13、thirteen;14 、fourteen;15 、fifteen;16 、sixteen;17、seventeen;18、eighteen;19 、nineteen;20 、twenty 。
扩展资料：
(1)从 20——99 整数几十中除twenty,thirty, forty,fifty,eighty为特殊形式外，sixty,seventy,ninety都是其个位数形式后添加后缀-ty构成 。表示几十几时，在几十和个位基数词形式之间添加连字符“-” 21 twenty-one 76 seventy-six
(2)百位数个数基数词形式加“hundred”，表示几百，在几十几与百位间加上and.
101 a hundred and one 320 three hundred and twenty 648 six hundred and forty-eight
(3)千位数以上 从数字的右端向左端数起，每三位数加一个逗号“，” 。从右开始，第一个“，”前的数字后添加 thousand，第二个“，”前面的数字后添加 million，第三个“，”前的数字后添加 billion 。然后一节一节分别表示，两个逗号之间最大的数为百位数形式 。
2,648 two thousand six hundred and forty-eight
16,250,064 sixteen million two hundred and fifty thousand and sixty-four
(4)基数词在表示确切的数字时，不能使用百、千、百万、十亿的复数形式；但是，当基数词表示不确切数字，如成百、成千上万，三三两两时，基数词则以复数形式出现 。
There are hundreds of people in the hall. 大厅里有数以百计的人 。
Thousands and thousands of people come to visit the Museum of Qin Terra-Cotta Warriors and Horses every day. 每天有成千上万的人来参观秦兵马俑博物馆 。
参考资料：百度百科——基数词
3. 求2个英语作文 My winter vacation
During the winter vacation, nothing is different for my life. I wake up 11 o'clock Am everyday, after a washing, I have a good lunch with my parents. Next I play computer games till the time to have supper. After have dinner. I go on playing till 2 o'clock Am, and then go to sleep with tired. This is one dull day of my winter vacation.