Question

13£®¼ÆËãÏÂÃæ¸÷Ì⣮
$\frac{3}{5}$+$\frac{2}{5}$¡Á$\frac{1}{3}$
$\frac{3}{4}$¡Â6+$\frac{3}{4}$¡Á$\frac{1}{6}$
2.4¡Â$\frac{8}{3}$-0.6
$\frac{5}{6}$¡Â$\frac{2}{3}$¡Â$\frac{5}{6}$
1-$\frac{7}{9}$¡Â$\frac{7}{8}$
$\frac{2}{9}$¡Á0.375¡Â$\frac{6}{7}$£®

Answer 1

·ÖÎö £¨1£©ÏÈËã³Ë·¨£¬ÔÙËã¼Ó·¨£»
£¨2£©°Ñ³ý·¨±äΪ³Ë·¨£¬ÔËÓó˷¨·ÖÅäÂɼòË㣻
£¨3£©ÏÈËã³ý·¨£¬ÔÙËã¼õ·¨£»
£¨4£©µ÷ÕûÔËËã˳Ðò£¬Ê¹¼ÆËã¼ò±ã£»
£¨5£©ÏÈËã³ý·¨£¬ÔÙËã¼õ·¨£»
£¨6£©°ÑСÊý»¯Îª·ÖÊý£¬°Ñ³ý·¨±äΪ³Ë·¨£¬Ô¼·Ö¼´¿É£®

½â´ð ½â£º£¨1£©$\frac{3}{5}$+$\frac{2}{5}$¡Á$\frac{1}{3}$
=$\frac{3}{5}$+$\frac{2}{15}$
=$\frac{11}{15}$

£¨2£©$\frac{3}{4}$¡Â6+$\frac{3}{4}$¡Á$\frac{1}{6}$
=$\frac{3}{4}$¡Á$\frac{1}{6}$+$\frac{3}{4}$¡Á$\frac{1}{6}$
=£¨$\frac{3}{4}$+$\frac{3}{4}$£©¡Á$\frac{1}{6}$
=1¡Á$\frac{1}{6}$
=$\frac{1}{6}$

£¨3£©2.4¡Â$\frac{8}{3}$-0.6
=2.4¡Á$\frac{3}{8}$-0.6
=0.9-0.6
=0.3

£¨4£©$\frac{5}{6}$¡Â$\frac{2}{3}$¡Â$\frac{5}{6}$
=$\frac{5}{6}$¡Â$\frac{5}{6}$¡Â$\frac{2}{3}$
=1¡Â$\frac{2}{3}$
=$\frac{3}{2}$

£¨5£©1-$\frac{7}{9}$¡Â$\frac{7}{8}$
=1-$\frac{7}{9}$¡Á$\frac{8}{7}$
=1-$\frac{8}{9}$
=$\frac{1}{9}$

£¨6£©$\frac{2}{9}$¡Á0.375¡Â$\frac{6}{7}$
=$\frac{2}{9}$¡Á$\frac{3}{8}$¡Á$\frac{7}{6}$
=$\frac{7}{72}$

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