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练习八,20.9,0.4,13.6,0.54,18.95,0.92,上午:164.93.547.11(米/小时)下午:206.74.545.93(米/小时)答:上午铺路的速度快。,2.9,2.86,2.857,0.9,0.85,0.851,1.2,1.20,1.197,1.90.04542.2答:蜘蛛的爬行速度大约是蜗牛的42.2倍。,示例:陆龟的爬行速度大约是蜗牛的几倍? 0.320.0457.1答:陆龟的爬行速度大约是蜗牛的7.1倍。,1.291,0.018,0.444,7.275,3052.6117.31(千米/时)答:平均每小时行117.31千米。,A超市:2.5615(元) 155873(元)B超市:2.6410.4(元) 10.46272.4(元)答: B超市便宜,一共需要72.4元。,1.5,5.3,6,9,26.1,8.1,11111.1111,22222.2222,33333.3333,44444.4444,55555.5555,66666.6666,444.222,4444.2222,0.4,0.16,0.875,0.4375,李叔叔在这个停车场最多停车3小时。,