读出下面各数:5920.588 3750000 1020900085 1900020000 3070004903050006 123456789 800070000 43250.716.
简便计算12.8﹣0.5×0.5﹣0.75 1.25×3.2×0.8 8.37×1.4+8.6×8.37.
下面的题能用简便方法计算的要用简便方法计算12.5×8.8÷11.
脱式计算:0.75×18÷0.15 7.28+3.2÷2.5 2.05÷0.82+33.61.08×0.8÷0.27 21.36÷0.8﹣12.9 4.28÷0.9÷4.1.
能简算的要简算1.2×0.4+0.4×1.3 4×(1.5+0.25) 0.25×4.78×4 (8.1﹣5.4)÷3.6+85.7.
计算下面各题,能简算的必须简算.9.5×1.06﹣2.52÷2.4 6.25÷1.25÷0.8 2.5×(3.5﹣1.65)×0.4 27.2÷(3.2+23×0.6) 68.5+31.5÷(0.29+0.41) 3.82×(2.8﹣1.3)﹣1.82×1.5.