42的英语怎么写

写法如下：

20-24：20 twenty、 21 twenty-one、 22 twenty-two、 23 twenty-three、 24 twenty-four

25-29：25 twenty-five、26 twenty-six、27 twenty-seven、28 twenty-eight、29 twenty-nine

30-34：30  thirty 、 31  thirty-one 、 32  thirty-two 、 33  thirty-three 、 34  thirty-four

35-39：35 thirty-five 、36 thirty-six 、37 thirty-seven 、38 thirty-eight、39 thirty-nine

40-44：40  forty、 41  forty-one、 42  forty-two、 43 forty-three 、 44  forty-four

45-49：45 forty-five、46 forty-six、47 forty-seven、48 forty-eight、49 forty-nine

分数、小数和百分数的英文写法如下：

1、1/2 : one-half

2、3/4 : three-fourths

3、 1/10 : one-tenth; a tenth

4、1/100 : one-hundredth

5、1/1000 : one-thousandth

6、1/10000 : one ten-thousandth

7、100% : one hundred per cent

8、0.5% : point five per cent

9、0.46% : point four six per cent

10、2.05 : two point nought five

11、6.003 : six point nought nought three

12、78.12 : seventy-eight point one two

20 twenty 21 twenty-one 22 twenty-two 23 twenty-three 24 twenty-four 25 twenty-five 26 twenty-six 27 twenty-seven 28 twenty-eight 29 twenty-nine 30 thirty 31 thirty-one 32 thirty-two 33 thirty-three 34 thirty-four 35 thirty-five 36 thirty-six 37 thirty-seven 38 thirty-eight 39 thirty-nine 40 forty 41 forty-one 42 forty-two 43 forty-three 44 forty-four 45 forty-five 46 forty-six 47 forty-seven 48 forty-eight 49 forty-nine