直接在口里写出下面各题的商.
计算下面各题(能用简便方法的用简便方法).22.7×1.25×O.8 3.91×2.8+6.09×2.89.83×(3.8﹣2.3)+1.5×6.17 3.6×51+36×4.97.8×9.9 5.4﹣3.2+12.6﹣7.87.2×4.1﹣9.5÷7.6 8.125×3+7×8.125(0.75×27.5﹣3.405)÷0.8 [0.16+(3﹣1.272)÷1.2]×1.25.
计算下面各题,能简算的要简算.8.5×(2.36+2.42)÷0.25 3.9÷1.3×6 4.25×6.3+3.7×4.25205×99 25.6﹣7.49﹣2.51 2.5﹣(6.8﹣4.9)×0.8.
下面各题怎样简便就怎样算.(1)3.7×99+3.7 (2)×7.7+3.3×0.75﹣75%(3)5.93+0.64+0.07+0.36 (4)(7.9﹣3.06÷0.68)×1.5(5)78÷2.5÷0.4 (6)105×(+)
计算下面各题,能简算的要简算.125×9.3×0.08 13.7×102﹣2×13.7(6.7+6.7+6.7+6.7)×2.5 4.5÷[(27.8﹣25.3)×0.4]0.096÷0.01+(75﹣28÷112) 90.8﹣(7.03﹣2.17)×4.5.
计算下面各题,能简便的就简便.(1)5.5×17.3+6.7×5.5 (2)1.5×105(3)9.07﹣22.78÷3.4 (4)3.8+4.29+2.1+4.2.