ÌâÄ¿ÄÚÈÝ

6£®ÔõÑù¼ò±ã¾ÍÕâÑùËã
1$\frac{3}{7}$¡Á$\frac{4}{5}$+2$\frac{4}{7}$¡Á$\frac{4}{5}$+$\frac{4}{5}$                           
£¨$\frac{2}{7}$+$\frac{1}{5}$£©¡Á7¡Á5
$\frac{8}{9}$¡Á[0.75-£¨$\frac{7}{16}$-$\frac{1}{4}$£©]
$\frac{1}{13}$+$\frac{12}{13}$¡Á£¨2.5-$\frac{1}{3}$£©
£¨5.6¡Á39¡Á0.48£©¡Â£¨1.4¡Á13¡Á2.4£©
1+2+3+4+5+6¡­+99+100+101£®

·ÖÎö £¨1£©£¨2£©ÔËÓó˷¨·ÖÅäÂɼòË㣻
£¨3£©ÏÈËãСÀ¨ºÅÄڵļõ·¨£¬ÔÙËãÖÐÀ¨ºÅÄڵļõ·¨£¬×îºóËãÀ¨ºÅÍâµÄ³Ë·¨£»
£¨4£©ÏÈËãÀ¨ºÅÄڵļõ·¨£¬ÔÙËãÀ¨ºÅÍâµÄ³Ë·¨£¬×îºóËãÀ¨ºÅÍâµÄ¼Ó·¨£»
£¨5£©µ÷ÕûÔËËã˳Ðò£¬Ê¹¼ÆËã¼ò±ã£»
£¨6£©´ËËãʽÊÇÒ»¸ö¹«²îΪ1µÄµÈ²îÊýÁУ¬ÔËÓøß˹ÇóºÍ¹«Ê½¼ÆË㣮

½â´ð ½â£º£¨1£©1$\frac{3}{7}$¡Á$\frac{4}{5}$+2$\frac{4}{7}$¡Á$\frac{4}{5}$+$\frac{4}{5}$  
=£¨1$\frac{3}{7}$+2$\frac{4}{7}$+1£©¡Á$\frac{4}{5}$
=5¡Á$\frac{4}{5}$
=4

£¨2£©£¨$\frac{2}{7}$+$\frac{1}{5}$£©¡Á7¡Á5
=$\frac{2}{7}$¡Á7¡Á5+$\frac{1}{5}$¡Á7¡Á5
=10+7
=17

£¨3£©$\frac{8}{9}$¡Á[0.75-£¨$\frac{7}{16}$-$\frac{1}{4}$£©]
=$\frac{8}{9}$¡Á[$\frac{3}{4}$-$\frac{3}{16}$]
=$\frac{8}{9}$¡Á$\frac{9}{16}$
=$\frac{1}{2}$

£¨4£©$\frac{1}{13}$+$\frac{12}{13}$¡Á£¨2.5-$\frac{1}{3}$£©
=$\frac{1}{13}$+$\frac{12}{13}$¡Á£¨$\frac{5}{2}$-$\frac{1}{3}$£©
=$\frac{1}{13}$+$\frac{12}{13}$¡Á$\frac{13}{6}$
=$\frac{1}{13}$+2
=2$\frac{1}{13}$

£¨5£©£¨5.6¡Á39¡Á0.48£©¡Â£¨1.4¡Á13¡Á2.4£©
=£¨5.6¡Â1.4£©¡Á£¨39¡Â13£©¡Á£¨0.48¡Â2.4£©
=4¡Á3¡Á0.2
=2.4

£¨6£©1+2+3+4+5+6¡­+99+100+101
=£¨1+101£©¡Á101¡Â2
=102¡Á101¡Â2
=5151

µãÆÀ Íê³É´ËÌ⣬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