Question

7£®¼ÆËãÏÂÃæ¸÷Ì⣬ÄܼòËãµÄ¾Í¼òË㣮
1-$\frac{2}{11}$¡Â$\frac{8}{11}$-$\frac{3}{4}$          
 5+$\frac{5}{8}$¡Á$\frac{3}{5}$¡Â$\frac{9}{8}$
$\frac{1}{3}$¡Â£¨$\frac{2}{3}$-$\frac{2}{5}$£©¡Á$\frac{3}{5}$
£¨$\frac{3}{5}$+$\frac{4}{15}$£©¡Á15
66¡Á$\frac{66}{67}$£®

Answer 1

·ÖÎö £¨1£©ÏÈËã³ý·¨£¬ÔÙ¸ù¾Ý¼õ·¨µÄÐÔÖʽøÐмòË㣻
£¨2£©ÏÈËã³Ë·¨£¬ÔÙËã³ý·¨£¬×îºóËã¼Ó·¨£»
£¨3£©ÏÈËãСÀ¨ºÅÀïÃæµÄ¼õ·¨£¬ÔÙËã³ý·¨£¬×îºóËã³Ë·¨£»
£¨4£©¸ù¾Ý³Ë·¨·ÖÅäÂɽøÐмòË㣻
£¨5£©66=67-1£¬ÔÙ¸ù¾Ý³Ë·¨·ÖÅäÂɽøÐмòË㣮

½â´ð ½â£º£¨1£©1-$\frac{2}{11}$¡Â$\frac{8}{11}$-$\frac{3}{4}$
=1-$\frac{1}{4}$-$\frac{3}{4}$
=1-£¨$\frac{1}{4}$+$\frac{3}{4}$£©
=1-1
=0£»

£¨2£©5+$\frac{5}{8}$¡Á$\frac{3}{5}$¡Â$\frac{9}{8}$
=5+$\frac{3}{8}$¡Â$\frac{9}{8}$
=5+$\frac{1}{3}$
=5$\frac{1}{3}$£»

£¨3£©$\frac{1}{3}$¡Â£¨$\frac{2}{3}$-$\frac{2}{5}$£©¡Á$\frac{3}{5}$
=$\frac{1}{3}$¡Â$\frac{4}{15}$¡Á$\frac{3}{5}$
=$\frac{5}{4}$¡Á$\frac{3}{5}$
=$\frac{3}{4}$£»

£¨4£©£¨$\frac{3}{5}$+$\frac{4}{15}$£©¡Á15
=$\frac{3}{5}$¡Á15+$\frac{4}{15}$¡Á15
=9+4
=13£»

£¨5£©66¡Á$\frac{66}{67}$
=£¨67-1£©¡Á$\frac{66}{67}$
=67¡Á$\frac{66}{67}$-1¡Á$\frac{66}{67}$
=66-$\frac{66}{67}$
=65$\frac{1}{67}$£®

µãÆÀ ¿¼²éÁËÔËË㶨ÂÉÓë¼ò±ãÔËË㣬ËÄÔò»ìºÏÔËË㣮עÒâÔËËã˳ÐòºÍÔËËã·¨Ôò£¬Áé»îÔËÓÃËùѧµÄÔËË㶨Âɼò±ã¼ÆË㣮