Question

1£®×Ðϸ¶ÁÌ⣬ֻÁÐʽ²»¼ÆË㣮
£¨1£©45µÄ$\frac{5}{9}$³ý$\frac{7}{8}$Óë$\frac{3}{4}$µÄºÍ£¬ÉÌÊǶàÉÙ£¿
£¨2£©ÍõÇ¿¶ÁÒ»±¾¹ÊÊÂÊ飬ÒѾ­¶ÁÁËÕâ±¾ÊéµÄ$\frac{2}{3}$£¬»¹Ê£50ҳû¶Á£®Õâ±¾ÊéÓжàÉÙÒ³£¿
£¨3£©ÑÏÖصÄË®ÍÁÁ÷ʧÖÂʹÿÄê´óÔ¼ÓÐ16ÒÚ¶ÖµÄÄàɳÁ÷Èë»ÆºÓ£¬ÆäÖÐ$\frac{1}{4}$µÄÄàɳ³Á»ýÔÚºÓµÀÖУ¬ÆäÓà±»´øµ½È뺣¿Ú£®ÓжàÉÙÒÚ¶ÖÄàɳ±»´øµ½È뺣¿Ú£¿
£¨4£©Ñ§Ð£×¼±¸»¨Ò»±ÊÇ®¹ºÖÃÒ»Åú×ÀµÊ£¬Èç¹ûÓÃÕâ±ÊǮȫ²¿Âò¿Î×À¿ÉÂò200ÕÅ£¬Èç¹ûÓÃÕâ±ÊǮȫ²¿¹ºÂòµÊ×Ó¿ÉÂò300ÕÅ£®ÏÖÔÚѧУÐèÒª³ÉÌ×¹ºÂò£¨Ò»ÕÅ¿Î×À¼ÓÒ»¸öµÊ×ÓΪһÌײú£©£¬Õâ±ÊǮȫ²¿¿É¹ºÂò¶àÉÙÌ×£¿
£¨5£©Ä³Ð£µÄÐËȤС×éÖУ¬ÃÀÊõС×éÓÐ25ÈË£¬ÃÀÊõС×éµÄÈËÊý±Èº½Ä£Ð¡×é¶à$\frac{1}{4}$£®º½Ä£Ð¡×éÓжàÉÙÈË£¿

Answer 1

·ÖÎö £¨1£©ÇóÉÌ£¬$\frac{7}{8}$Óë$\frac{3}{4}$µÄºÍÊDZ»³ýÊý£¬45µÄ$\frac{5}{9}$ÊdzýÊý£¬ÁÐʽ£¨$\frac{7}{8}$+$\frac{3}{4}$£©¡Â£¨45¡Á$\frac{5}{9}$£©£»
£¨2£©°ÑÕâ±¾¹ÊÊÂÊéµÄ×ÜÒ³Êý¿´×÷µ¥Î»¡°1¡±£¬ÓÃ1-$\frac{2}{3}$Çó³öÊ£ÓàÒ³ÊýÕ¼×ÜÒ³ÊýµÄ·ÖÂÊ£¬Ò²¾ÍÊÇ50Ò³Õ¼×ÜÒ³ÊýµÄ·ÖÂÊ£¬×îºóÒÀ¾Ý·ÖÊý³ý·¨ÒâÒå½â´ð¼´¿É£»
£¨3£©°ÑÿÄêÁ÷Èë»ÆºÓµÄÄàɳÖØÁ¿¿´×÷µ¥Î»¡°1¡±£¬ÆäÖÐ$\frac{1}{4}$µÄÄàɳ³Á»ýÔÚºÓµÀÖУ¬Ôò±»´øµ½È뺣¿ÚµÄÕ¼µ¥Î»¡°1¡±µÄ1-$\frac{1}{4}$=$\frac{3}{4}$£¬¸ù¾Ý·ÖÊý³Ë·¨µÄÒâÒå½â´ð¼´¿É£»
£¨4£©°ÑÕâ±ÊÇ®µÄÊýÄ¿¿´×÷µ¥Î»¡°1¡±£¬ÒÀ¾Ýµ¥¼Û=×ܼۡÂÊýÁ¿£¬·Ö±ðÇó³öÂòÒ»ÕÅ¿Î×ÀºÍÒ»¸öµÊ×ӵļÛÇ®£¬ÔÙ¸ù¾ÝÊýÁ¿=×ܼۡµ¥¼ÛºÍ¼´¿É½â´ð£»
£¨5£©°Ñº½Ä£Ð¡×éÈËÊý¿´×÷µ¥Î»¡°1¡±£¬ÃÀÊõС×éµÄÈËÊý±Èº½Ä£Ð¡×é¶à$\frac{1}{4}$£¬Ò²¾ÍÊÇ˵ÃÀÊõС×éµÄÈËÊýÊǺ½Ä£Ð¡×éµÄ1+$\frac{1}{4}$=$\frac{5}{4}$£¬Ò²¾ÍÊÇ25ÈËÕ¼º½Ä£Ð¡×éÈËÊýµÄ·ÖÂÊ£¬ÔËÓ÷ÖÊý³ý·¨ÒâÒå¼´¿É½â´ð£®

½â´ð ½â£º£¨1£©£¨$\frac{7}{8}$+$\frac{3}{4}$£©¡Â£¨45¡Á$\frac{5}{9}$£©
=$\frac{13}{8}$¡Â25
=$\frac{13}{200}$£»
´ð£ºÉÌÊÇ$\frac{13}{200}$£®

£¨2£©50¡Â£¨1-$\frac{2}{3}$£©
=50$¡Â\frac{1}{3}$
=150£¨Ò³£©£»
´ð£ºÕâ±¾ÊéÓÐ150Ò³£®

£¨3£©16¡Á£¨1-$\frac{1}{4}$£©
=16¡Á$\frac{3}{4}$
=12£¨ÒÚ¶Ö£©£»
´ð£ºÓÐ12ÒÚ¶ÖÄàɳ±»´øµ½È뺣¿Ú£®

£¨4£©1¡Â£¨$\frac{1}{200}$+$\frac{1}{300}$£©
=1$\frac{1}{120}$
=120£¨Ì×£©£»
´ð£º×î¶à¿ÉÒÔÂò120Ì׿Î×ÀÒÎ×Ó£®

£¨5£©25¡Â£¨1+$\frac{1}{4}$£©
=25$¡Â\frac{5}{4}$
=20£¨ÈË£©£»
´ð£ºº½Ä£Ð¡×éÓÐ20ÈË£®

µãÆÀ ½â´ð´ËÌâµÄ¹Ø¼üÊÇ·ÖÇåÁ½¸öµ¥Î»¡°1¡±µÄÇø±ð£¬Çóµ¥Î»¡°1¡±µÄ¼¸·ÖÖ®¼¸Óó˷¨£»ÒÑÖªµ¥Î»¡°1¡±µÄ¼¸·ÖÖ®¼¸ÊǶàÉÙ£¬Çóµ¥Î»¡°1¡±Óóý·¨£®