直接写出得数.39÷3= 80÷20= 640÷80=800÷400= 240÷60= 20×5=270÷90= 570÷3= 3500÷700=900÷100=
计算下面各题,怎样简便就怎样计算.0.75×3.6×10.75.06×(2.08÷5.2)4.8×0.7÷4.824.6÷2.5÷0.4.
0.25×27×4 45×36+64×45 1.25×320×25 0.96×259.9×999+9.9 1.08×125 8×25×1.25×16 489×101﹣48933×1.03 28×45+30×13 5.6×9+56 0.98×54.
递等式计算,写出必要的计算过程,能简便计算的用简便方法计算:(1)7.06×2.4﹣5.7 (2)5.4×99+5.4 (3)9.6×72+9.6×28(4)(1.25×2.5)×4 (5)10.4+72×0.81 (6)11×0.6×0.4(7)(12.8+4.99)÷0.2 (8)1.25×8+2.5×4.4.
怎样简算怎样算.12.5×3.2 0.125×3.41×803.1×0.991.25×(8.1+0.7)1.25×0.88+1.12×1.25.
7.25÷0.8÷0.125 4.92÷0.25÷0.40.75×18÷0.15 0.34×2.5÷3.4.