直接写出得数.870﹣780= 40×13= 105÷3= 60÷12=88÷22= 12×4÷12×4= 25×189×0= 800÷80=
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 0.125×3.41×80 3.1×0.99 1.25×(8.1+0.7) 1.25×0.88+1.12×1.25.
7.25÷0.8÷0.125 4.92÷0.25÷0.4 0.75×18÷0.15 0.34×2.5÷3.4.
计算下面各题. 0.25×4.78×4 32×1.25+1.25×68 10.4﹣9.6×0.5 3.12+3.12×99.
计算下面各题. 7.4×9.9 1.25×(8×0.8) 7.3×4.5﹣28.4.