英语简单数学运算的表达PPT资料(正式版)

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hundred(and) seventy-nine; • • (2) 号码、货币的读法: • 1023←→one o two three; • 1227←→one double two(or two two)seven;. • 25←→four dollars(and)twenty-five(cents);
Two plus three is (equals, is equal to) five.
6. 英语中“万” 及以上的表示法: 减 minus, subtract
½ a (one) half 1/3 one third
4 plus 3 equals 7.
53,461 12 minus 7 leaves 5.
3,333,333,333
7. hundred, thousand, million,billion前有确切数词时, 遵循“两个无”原则,即无 “s”,无“of”。
three hundred people nine million books three hundreds people three hundred of books
an 8oo-hundred-word composition a five-week holiday a 20-meter-tall building
10. 基数词可以表示年代、时刻、住所、房间、教室、 号码等。 in 1980’s (1980s) == in nineteen eighties Page three Room 403 at seven thirty in 1991 (in nineteen ninety-one) in one’s fifties(在某人50多岁的时候)
eleven twelve 2. 13~19的基数词一般在3~9对应的基数词后加 -teen构成,注意:
thirteen fifteen eighteen
3. 20~90八个整十位数以后缀-ty结尾。注意:
twenty (20) thirty (30) forty (40) eighty (80)
4. “几十几“的基数词由十位数和个位数中间加 连字符 “-”构成:
• 3×2=6 Three times two is six.

Three by two are six.
• 9÷3=3 Nine divided by three makes three.
Can you read?
• (1)年号的读法: • 1979←→nineteen seventy-nine or nineteen
• 减 minus (介词,作形容词讲时,是“负 的”的意思,相当negative)
• subtract(动词,常与from连用)减去; 扣除
• 12 minus 7 leaves 5. 十二减去七剩五。
• If you subtract 3 from 5, you get 2. The temperature was minus 20 degrees. 温度是零下20度。
Two plus three is (equals, is equal to) five.
fifty-three thousand, 25←→four dollars(and)twenty-five(cents);
subtraction减法
six
hundred
and
forty-one
3.
30,045,310 注意下列习惯表达方式:
加减乘除的名词形式如下
• 1. addition 加法 2. subtraction减法 3 .multiplication乘法 4 .division除法
• 2+3=5
• Two plus three is (equals, is equal to) five.
• 5-3=2 Five minus three is equal to two.
英语简单数学运算的表达
加 plus, add
• 加 plus(介词,作形容词时,是正的, 等同于positive) add(动词)
• 4 plus 3 equals 7. If you add 4 to 3 you get 7.
• Her mark was B plus。 她的分数B+。
减 minus, subtract
8. 但hundred, thousand, million, billion前无确切数词 时,则遵循“两个有”原则,即有 “s”和“of”。
many thousands of trees millions of birds tens of thousands of soldiers
9.基数词常与名词连用构成复合定语,中间要用连字符, 而且只用名词的单数形式.
乘 multiply
• 乘 multiply(动词) •
3 multiplied by 5 is 15. 三乘五等于十五。
除 divide
• 除 divide(动词)
• 15 divided by 3 is 5. 3 除15等于5。 Three will not divide into eleven. 三除不尽十一。
twenty-nine
ninety-seven
5. 百位数和十位数之间,在英国英语要用 “and”连接, 在 一般不用。
three hundred and five four hundred and forty-
five
“几十几”的数及4位数以上基数词的序数词
Page three Room 403
• (3)小数点的读法: • 13.91←→thirteen decimal(point)nineone; • 0.23=nought demical two t数词)
ordinal numbers (序数词)
基数词(cardinal numbers)的构成及用法: 1. 1~12的基数词是独立单词,无规律可循。
every other day
½ a (one) half 1/3 one third
thirty million 注意下列习惯表达方式:
Her mark was B plus。
and
forty-five
thousand,
three
hundred
and
ten
23=nought demical two three;
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