ÌâÄ¿ÄÚÈÝ

20£®¼ÆËãÏÂÁи÷Ì⣬ÄܼòËãµÄÒª¼òË㣮
$\frac{5}{6}$¡Â£¨$\frac{1}{2}$+$\frac{5}{6}$£©£¨$\frac{8}{9}$+$\frac{4}{27}$£©¡Á27$\frac{3}{4}$¡Â$\frac{7}{8}$¡Â$\frac{15}{14}$
£¨3.4-2.4£©¡Â$\frac{1}{5}$¡Á$\frac{4}{7}$ £¨1¡Â$\frac{1}{4}$+$\frac{1}{4}$¡Â1£©¡Á487¡Á$\frac{3}{86}$  
$\frac{33}{34}$¡Â$\frac{22}{17}$+$\frac{5}{12}$

·ÖÎö £¨1£©ÏÈËã¼Ó·¨£¬ÔÙËã³ý·¨£»
£¨2£©¡¢£¨6£©¸ù¾Ý³Ë·¨·ÖÅäÂɽøÐмòË㣻
£¨3£©°´ÕÕ´Ó×óÏòÓÒµÄ˳Ðò½øÐмÆË㣻
£¨4£©ÏÈËã¼õ·¨£¬ÔÙËã³ý·¨£¬×îºóËã³Ë·¨£»
£¨5£©ÏÈËã³ý·¨£¬ÔÙËã¼Ó·¨£¬×îºóËã³Ë·¨£»
£¨7£©ÏÈËã³ý·¨£¬ÔÙËã¼Ó·¨£®

½â´ð ½â£º£¨1£©$\frac{5}{6}$¡Â£¨$\frac{1}{2}$+$\frac{5}{6}$£©
=$\frac{5}{6}$¡Â$\frac{4}{3}$
=$\frac{15}{24}$£»

£¨2£©£¨$\frac{8}{9}$+$\frac{4}{27}$£©¡Á27
=$\frac{8}{9}$¡Á27+$\frac{4}{27}$¡Á27
=24+4
=28£»

£¨3£©$\frac{3}{4}$¡Â$\frac{7}{8}$¡Â$\frac{15}{14}$
=$\frac{6}{7}$¡Â$\frac{15}{14}$
=$\frac{4}{5}$£»

£¨4£©£¨3.4-2.4£©¡Â$\frac{1}{5}$¡Á$\frac{4}{7}$
=1¡Â$\frac{1}{5}$¡Á$\frac{4}{7}$
=5¡Á$\frac{4}{7}$
=$\frac{20}{7}$£»

£¨5£©£¨1¡Â$\frac{1}{4}$+$\frac{1}{4}$¡Â1£©¡Á4
=£¨4+$\frac{1}{4}$£©¡Á4
=$\frac{17}{4}$¡Á4
=17£»

£¨6£©87¡Á$\frac{3}{86}$
=£¨86+1£©¡Á$\frac{3}{86}$
=86¡Á$\frac{3}{86}$+1¡Á$\frac{3}{86}$
=3+$\frac{3}{86}$
=3$\frac{3}{86}$£»

£¨7£©$\frac{33}{34}$¡Â$\frac{22}{17}$+$\frac{5}{12}$
=$\frac{3}{4}$+$\frac{5}{12}$
=$\frac{7}{6}$£®

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

Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿

Î¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨µç»°£º027-86699610 ¾Ù±¨ÓÊÏ䣺58377363@163.com

¾«Ó¢¼Ò½ÌÍø