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1、一、直接写出得数。一、直接写出得数。0.3+0.6= 8.10.3+0.6= 8.13.1= 43.1= 40.09=0.09=202080= 0.63+0.7= 4.180= 0.63+0.7= 4.11.4=1.4=70705= 3.4+5.65= 3.4+5.6= = 0.38+0.020.38+0.02= =1 10.09= 0.61+0.3= 2.10.09= 0.61+0.3= 2.11.34=1.34=0.953.0116001.332.71490.40.010.910.76笔笔0.8024.0015.4044.706.00=90.990.90.8024.0015.4044.70
2、6.00=90.910090.9 =9.1(元)(元)9.125.59.25=16.25(元)(元)2)25.515.45=10.05(元)(元)3)25.515.45=40.95(元)(元)4)9.2515.45=27.4(元)(元)27.425.5=10.33=8.63=4.2=10.15=8=0.08=17.38=116.41=6.135=12.135=4.138=49.152=10.415=38.283=47.943=8.4991103.50971.00945.20931.952989.952906.952942.952937.452900.052532.052094765.451.892.8893.88899.8899个个8 被减数十分位的被减数十分位的8看成看成3,差少了差少了0.5. 减数百分位上的减数百分位上的1看成了看成了7,差又少了差又少了0.06. 错误答案与正确答案相比差少了错误答案与正确答案相比差少了0.56