列竖式计算:打*的要验算,要争取全做对!*503÷8= *860÷9= *616÷6= 69×54= 80×54= 49×18=
递等式计算,能简便的用简便方法计算. 15.5×8.2﹣0.72 0.25×0.89×4 4.8×1.25 7.65÷0.85+1.1.
21.73+(7.02﹣1.73)+1.98 312﹣12×16+2440﹣4.72+5.28 57×39﹣39+39×449000÷3630﹣[17.8+(6.2+38÷10)].
①15.8×0.6+15.8×0.4 ②(1﹣0.32×0.5)÷0.6.
1.69÷1.3+2.5×0.4 15.8×0.6+15.8×0.4 96.5×105﹣5×96.5.
计算下面各题,能简算的要简算. ①35×1.25×2×0.8 ②4.8÷(1.2+0.4) ③3.9×10.1. ④78+3.78×99 ⑤(7.7+1.547)÷0.7.