<参考>  
      
      
      
        
          | 
             one hundred thousand  | 
          
             100,000  | 
          
               十万  |   
      
      
        
          | 
             ten million  | 
          
             10,000,000  | 
          
               一千万  |   
      
        
          | 
             one hundred million  | 
          
             100,000,000  | 
          
               一億  |   
      
        
          | 
             one 
            billion  | 
          
             1,000,000,000  | 
          
               十億  |   
      
        
          | 
             ten billion  | 
          
             10,000,000,000  | 
          
               百億  |   
      
        
          | 
             one hundred billion  | 
          
             100,000,000,000  | 
          
               一千億  |   
      
        
          | 
             one 
            trillion  | 
          
             1,000,000,000,000  | 
          
               一兆  |   
      12,345,678  twelve million, 
      three hundred (and) forty-five thousand, 
      six hundred (and) seventy-eight
       ・ 数詞によるたくさんの数をあらわす表現 hundreds 
      of... 何百もの...    (hundreds of people: 何百人もの人々) thousands 
      of... 何千もの... tens of thousands of... 何万もの... hundreds of thousands 
      of... 何十万もの... millions of... 何百万もの... tens of millions 
      of... 数千万もの... hundreds of millions of... 何億もの... billions 
      of... 何十億もの...
       ・ 
      大体の数(およそ、約、だいたい...から...ぐらい)をあらわすときに使う表現 about .... around 
      ... approximately ... somewhere between .... and ...
       ・ 分数  分子から先に読む。分子が2以上の時は分母を複数形にする。 1/2 
      = one-half  [a half]         
      (We walked [for] one-half of a mile.: 我々は1/2マイル歩いた) 1/3 = one-third [a 
      third] 2/3 = two-thirds 1/4 = one-quarter 
      [a quarter] 3/4 = three-quarters 1/5 = 
      one-fifth [a fifth] 2/5 = two-fifths 3-2/5 = three and 
      two-fifths
       ・ 小数 小数点を point 、0は zero 
      と読む。1.0以下は単数、1.1以上は複数扱い。 0.5 [zero point five]   (0.5 
      inch) 1.23 [one point two three]   (1.23 
  inches)  |