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英语加减乘除-课件PPT(精)

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ual to) five.?5-3=2 Five minus three is equal to two. ?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?Can you read??(1)年号的读法:?1979←→een seventy-nine or een hundred(and) seventy-nine; ??(2)电话号码、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); ?(3)小数点的读法:?13.91←→thirteen decimal(point)nineone;?0.23=noughtdemical two three; Numberscardinal numbers (基数词) 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。eleven twelve2. 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 eighteen3. 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:twenty-nine y-seven

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