苏教版小学数学第九册执教：姚旭瑾直接说出得数0.98×0.1=1－0.99=1.25×0.8=0.6÷0.01=6.37＋4.63=4.9÷7=0.24×5=0.1-0.01=8÷0.125=0.098601.20.01116410.70.09×812.5×6.7+12.5×3.3=12.5×（6.7+3.3）=12.5×10=125×13.78×99＋3.785.6×101－5.6×12.5×6.8×0.0415－2.68－7.323.5×2.7-3.5×0.74.35＋0.17＋0.65＋0.8535÷（0.35×4）（2.5＋0.25）×42.5×12.5×0.32102×0.873.5÷1.42.6×9.9（0.4×0.8）（100+2）（0.7×2）（10-0.1）5.23×4＋4.77÷0.2563.2×0.1＋6.32×94.77×463.2×0.96.32×130.34＋9.76－10.345.12-（3×0.04+3.3）=5.12-（1.12+3.3）易错题辨析8.45＋3.67－8.45＋3.674.3×0.1÷4.3×0.12＋8÷0.441－7.7＋2.3利用策略可以简便计算利用规律进行简便简算0.3×0.3＝0.090.33×0.33＝0.10890.333×0.333＝0.1108890.3333×0.3333＝0.33333×0.33333＝0.111088890.1111088889
