列竖式计算.342÷3=验算: 804÷5=验算: 2040÷6=验算:504÷5= 45×12= 520÷4=
怎样算简便就怎样算 ①9.5﹣9.5×(9.5﹣9.5)÷9.5 ②12.5×4×0.25×80 ③45.893﹣(3.7+25.893) ④20﹣[8.07+(7.54﹣3.86)].
简便计算. ①0.8×7.7+2.3×0.8 ②36×10.1.
用简便方法计算. 37+125+63+175 75×56﹣56×28 8×(29×l25) 156×l0l﹣156.
用简便方法计算 0.33×0.5×46.3×2.3+7.7×6.31.25×0.9×0.85.8×100.1.
125×0.32×2.5.