578.6是44的多少倍?
简便计算.0.125×3.2×2.5 102×0.45.
用简便方法计算:304×22; 48×101﹣48; (30+2)×15.
怎样算简便就怎样算①9.5﹣9.5×(9.5﹣9.5)÷9.5②12.5×4×0.25×80③45.893﹣(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.