1、口算：,0.80.5= 1.60.38= 10.75= 0.480.03= 61.2= 42.5= 0.5614= 0.920.4=,630452 28035 0.5614,2、这三道题有没有更简便的方法,0.4,1.98,0.25,5,10,0.04,2.3,16,=7,=8,=0.04,5.635,5.635,0.85,0.16,更多全套课件免费下载： 绿色圃中小学教育网http:/,9.30.50.6,你认为哪种方法更简便？,用简便方法计算：5.44.8 7.24.5 724.8 0.423.5 0.2540.258.41.250.8 10.40.252,在括号里填上适当的数：,
