小学数学五年级下册口算练习 7.827.2 2.199.1 0.90.18 18710000.08110 0.960.8 100.05 0.137 0.21100 0.054 12.58 2.34 0.450 300.1 2.63 4.12 7.50.1 10.08 3.50.01 1.250.252 0.650.2 59 1.253.30 6.82.43 0.9710.7 0.60.30.5 1.80.90.5 60.1258 10.010.1254254 203.77.3 37.29937.2