ÌâÄ¿ÄÚÈÝ
19£®ÍÑʽ¼ÆË㣺£¨1£©£¨$\frac{5}{9}$+$\frac{5}{9}$+$\frac{5}{9}$+$\frac{5}{9}$£©¡Á0.25£»
£¨2£©25¡Á£¨$\frac{1}{3}$¡Á$\frac{2}{5}$£©¡Á$\frac{3}{10}$£»
£¨3£©$\frac{1}{3}$¡Â[£¨$\frac{11}{12}$-$\frac{5}{6}$£©¡Á$\frac{4}{5}$]£»
£¨4£©£¨1+$\frac{1}{2}$£©¡Á£¨1+$\frac{1}{3}$£©¡Á£¨1+$\frac{1}{4}$£©¡Á£¨1+$\frac{1}{5}$£©¡Á£¨1+$\frac{1}{6}$£©£®
·ÖÎö £¨1£©¸ù¾Ý·ÖÊý³Ë·¨µÄÒâÒ壬ÔËÓó˷¨µÄ½áºÏÂɽøÐмòË㣻
£¨2£©ÏÈÈ¥À¨ºÅ£¬ÔÙÔËÓó˷¨µÄ½»»»ÂÉ¡¢½áºÏÂɽøÐмòË㣻
£¨3£©ÏÈËãСÀ¨ºÅÀïµÄ¼õ·¨£¬ÔÙËãÖÐÀ¨ºÅÀïµÄ³Ë·¨£¬×îºóËãÀ¨ºÅÍâµÄ³ý·¨£»
£¨4£©ÏÈËãСÀ¨ºÅÀïµÄ¼Ó·¨£¬ÔÙËãÀ¨ºÅÍâµÄ³Ë·¨£®
½â´ð ½â£º£¨1£©£¨$\frac{5}{9}$+$\frac{5}{9}$+$\frac{5}{9}$+$\frac{5}{9}$£©¡Á0.25
=£¨$\frac{5}{9}$¡Á4£©¡Á0.25
=$\frac{5}{9}$¡Á£¨4¡Á0.25£©
=$\frac{5}{9}$¡Á1
=$\frac{5}{9}$£»
£¨2£©25¡Á£¨$\frac{1}{3}$¡Á$\frac{2}{5}$£©¡Á$\frac{3}{10}$
=25¡Á$\frac{1}{3}$¡Á$\frac{2}{5}$¡Á$\frac{3}{10}$
=£¨25¡Á$\frac{2}{5}$£©¡Á£¨$\frac{1}{3}$¡Á$\frac{3}{10}$£©
=10¡Á$\frac{1}{10}$
=1£»
£¨3£©$\frac{1}{3}$¡Â[£¨$\frac{11}{12}$-$\frac{5}{6}$£©¡Á$\frac{4}{5}$]
=$\frac{1}{3}$¡Â[$\frac{1}{12}$¡Á$\frac{4}{5}$]
=$\frac{1}{3}$¡Â$\frac{1}{15}$
=5£»
£¨4£©£¨1+$\frac{1}{2}$£©¡Á£¨1+$\frac{1}{3}$£©¡Á£¨1+$\frac{1}{4}$£©¡Á£¨1+$\frac{1}{5}$£©¡Á£¨1+$\frac{1}{6}$£©
=$\frac{3}{2}$¡Á$\frac{4}{3}$¡Á$\frac{5}{4}$¡Á$\frac{6}{5}$¡Á$\frac{7}{6}$
=$\frac{3¡Á4¡Á5¡Á6¡Á7}{2¡Á3¡Á4¡Á5¡Á6}$
=$\frac{7}{2}$£®
µãÆÀ Íê³É´ËÀàÌâÄ¿ÒªÈÏÕæ·ÖÎöʽÖÐÊý¾ÝµÄÌص㼰ÄÚÔÚÁªÏµ£¬È»ºóÑ¡ÔñºÏÊʵķ½·¨½øÐмÆË㣮
