(1)28﹣[19.08+(3.2﹣0.299÷0.23)]×0.5(2)64×1.25×2.5×5(3)34.5×9.23﹣34.5+1.77×34.5(4)(67.8+9.48)÷0.96﹣2.58×3.35.
用递等式计算,能简便的要简便计算 8.3﹣2.4×1.523.4÷7.8+2.1 2.5×6.3+2.5×3.71.25×2.3×0.8.
直接写出得数. 0.5×0.8=0.03+1.7=0.63÷0.07=2.5×3.1×0.4= 4÷0.01=1﹣0.66=7.2×0.6=0.2×0.2÷0.2×0.2=
脱式计算,能简算要简算. 72.8÷2.5÷40.83×7.2+0.83×2.818.305÷0.14﹣58.67 7.8×9.9.
下面各题,怎样算简便就怎样算. 23.8﹣(13.8﹣5.6) 12.9﹣3.7+2.71﹣6.3 15.74﹣4.8﹣(15.74+5.2)8.6+0.4﹣8.6+0.4.
混合运算(能简便的一定要简便) 4.58+3.38+6.620.25×0.125×4×8 4.2×0.75+0.75×5.86.38÷0.25÷4.