数学运算英语表示

英语加减乘除表达
1.加减乘除公式
⑴ A＋B＝C A plusB equals/is C
20＋5＝25 Twenty plus 5 equals/is twenty-five.
⑵ A－B＝C A minusB equals/is C
20－5＝15 Twenty minus 5 equals/is fifteen.
⑶ A×B＝C A multiplied byB equals/is C
20×5＝100 Twenty multiplied by 5 equals/is one hundred.
⑷ A÷B＝C A divided byB equals/is C
20÷5＝4 Twenty divided by 5 equals/is four.
2.加减乘除口语化的表达
⑴ Add twenty and five, we can get twenty-five.
⑵ Subtract five from twenty, we can get fifteen.
⑶ Multiply twenty by five, we can get one hundred.
⑷ Divide twenty by five, we can four.
3. 用how much对加减乘除进行提问
⑴Twenty minus five equals fifteen.
How much does twenty minus five equal?
⑵Twenty minus five is fifteen.
How much is twenty minus five?
英语分数、小数及百分数的表达
1.表达形式
⑴分数
①基本规则：子基母序（即：分子用基数词，分母用序数词）
1/3 one third 1/8 one eighth 1/12 one twelfth
②当分子大于1时，分母要加s变成复数。

2/3 two thirds 3/8 three eighths 5/12 five twelfths
③特殊的表达：
1/4 可以表示为 one fourth 或者 a quarter
3/4 可以表示为 three fourth 或者 three quarters
1/2 a half
⑵.小数
小数点前后的数均按基数词来读，小数点读成point，小数点后的数字逐位读出。

3.1415926 three point one four one five nine two six
0.463 zero point four six three
⑶.百分数
汉语中先读百分号，再读数字；英语中恰恰相反：先念出数字，再加上百分号percent
80% eighty percent
99.5% ninety-nine point five percent
2.由分数、小数或百分数构成主语时，其后的谓语跟分数、小数或百分数的单复并无关系，而是由这些数后的名词的情况来决定。

⑴当所修饰的名词是不可数名词或可数名词的单数时，谓语用单数。

T hree quarters of the earth’s surface is water.
⑵当所修饰的名词是可数名词的复数时，谓语用复数。

Half of the students are going outing in Suzhou amusement park.。