小数乘以小数(2)基础练习1.口算。0.210.1=0.30.01=0.210.34=0.150.58=0.40.08=0.020.46=0.190.18=0.580.67=0.340.71=1.020.06=1.080.04=0.160.48=2.竖式计算。1.080.090.780.050.980.0651.0560.050.30.0982.010.0143.050.0140.0690.32.10.00340.450.034.20.0070.20.069拓展提高3.先判断,如果错误的请改错。2.43.9-3.8 0.260.85+7.8=2.40.1=2.21+7.8=0.24()=10.01()3.14.2+0.3 1.56+2.348=13.02+0.3=1.56+19.04=13.32()=20.6()44第五单元 小数乘法和除法发散思维4.甲乙两人从 A、B两点同时相对而行,甲每分钟0.15千米,乙每分钟走0.06千米,0.4分钟后相遇。A、B两点相距多少千米?5.修路队前三天共修路0.18千米,后4天平均每天修0.08千米。这个周修路队共修路多少千米?54
