Question

20£®ÕýÈ·¡¢ºÏÀíµØ¼ÆË㣮
45¡Á$\frac{3}{8}$+56¡Á37.5%-0.375         
$\frac{13}{19}$-$\frac{3}{13}$+$\frac{25}{19}$-$\frac{10}{13}$      
£¨$\frac{2}{15}$+$\frac{3}{11}$£©¡Á15¡Á11
0.7¡Â[£¨$\frac{5}{6}$-$\frac{1}{4}$£©¡Á24]
$\frac{13}{18}$¡Á£¨$\frac{9}{18}$¡Á17+$\frac{9}{18}$£©

Answer 1

·ÖÎö £¨1£©¸ù¾Ý³Ë·¨·ÖÅäÂɽøÐмòËã¼´¿É£»
£¨2£©¸ù¾Ý½áºÏÂɺͼõ·¨µÄÐÔÖʽøÐмòËã¼´¿É£»
£¨3£©¸ù¾Ý³Ë·¨·ÖÅäÂɽøÐмòËã¼´¿É£»
£¨4£©¸ù¾Ý³Ë·¨·ÖÅäÂɽøÐмòËã¼´¿É£»
£¨5£©¸ù¾Ý³Ë·¨·ÖÅäÂɽøÐмòËã¼´¿É£®

½â´ð ½â£º£¨1£©45¡Á$\frac{3}{8}$+56¡Á37.5%-0.375
=45¡Á0.375+56¡Á0.375-0.375¡Á1
=£¨45+56-1£©¡Á0.375
=100¡Á0.375
=37.5£»

£¨2£©$\frac{13}{19}$-$\frac{3}{13}$+$\frac{25}{19}$-$\frac{10}{13}$
=£¨$\frac{13}{19}$+$\frac{25}{19}$£©-£¨$\frac{3}{13}$+$\frac{10}{13}$£©
=2-1
=1£»

£¨3£©£¨$\frac{2}{15}$+$\frac{3}{11}$£©¡Á15¡Á11
=$\frac{2}{15}$¡Á15¡Á11+$\frac{3}{11}$¡Á15¡Á11
=22+45
=67£»

£¨4£©0.7¡Â[£¨$\frac{5}{6}$-$\frac{1}{4}$£©¡Á24]
=0.7¡Â[$\frac{5}{6}$¡Á24-$\frac{1}{4}$¡Á24]
=0.7¡Â14
=0.05£»

£¨5£©$\frac{3}{18}$¡Á£¨$\frac{9}{18}$¡Á17+$\frac{9}{18}$£©
=$\frac{3}{18}$¡Á£¨$\frac{9}{18}$¡Á18£©
=$\frac{3}{18}$¡Á9
=$\frac{3}{2}$£®

µãÆÀ ¿¼²éÁË·ÖÊýËÄÔò»ìºÏÔËË㣬עÒâÔËËã˳ÐòºÍÔËËã·¨Ôò£¬Áé»îÔËÓÃËùѧÔËË㶨ÂɽøÐмò±ãÔËË㣮