用竖式计算下列各题. 168×45= ②403×37= ③543×25= ④1632×125=
直接写得数.2﹣0.64﹣0.36﹦ 0.25×4÷0.25×4= 6.3+7=1.25×3.3×0﹦ 2.19+9.1= 37.2×99+37.2﹦
脱式计算,能简算的要简算.1.69÷1.3+2.5×0.4 1.25×32×2.5 96.5×105﹣5×96.5 18.75﹣0.43﹣4.57.
递等式计算.(能简算的要简算)0.125×32×2.5; 0.8×6.3﹣0.8×3.8 0.64÷0.4÷0.8.
(25+2.5)×0.4 1.25×7.2 3.75×2.9+2.9×6.25 3.25+110.4÷(3.2×2.3) 2.5×54.8﹣2.5×14.8 6.3÷(13﹣3.15÷0.3)
递等式计算(能简便的要简便计算)9.6÷0.4×0.25 8.68﹣8.68÷0.56×0.5 29.7÷(5.85÷0.65)1.25×3.2×0.8 14.5×102 4.7×4.7+4.7+4.7×4.3.