7.2+1.25的简便方法

施先钱35397.2*1.25*1..4用简便方法计算 -
蔚功炎19141208564 ______ 原式=(8x0.9)x1.25x1.4=(8x1.25)x(0.9x1.4)=10x1.26=12.6 供参考.

施先钱35397.2+2.8*1.25*8的简便计算
蔚功炎19141208564 ______ 7.2+2.8*1.25*8=7.2+2.8*﹙1.25*8﹚=7.2+2.8*10=7.2+28=35.2

施先钱35394.45*7.2+1.25*9.6用简便方法怎么做? -
蔚功炎19141208564 ______ 4.45*3*2.4+1.25*4*2.4=2.4*(4.45*3+1.25*4)

施先钱35391.25*7+1.25的简便计算 -
蔚功炎19141208564 ______ 1.25*7+1.25=1.25*8=10.

施先钱3539简便方式9除以1.25怎么算 -
蔚功炎19141208564 ______ 9÷1.25 =(9*8)÷(1.25*8) =72÷10 =7.2

施先钱35391.25*8.7*7.2的简便方法 -
蔚功炎19141208564 ______ 1.25*8.7*7.2 =1.25x8x0.9x8.7 =10x0.9x8.7 =8.7x10-8.7x1 =87-8.7 =78.3

施先钱35391.25*87*7.2 简便方法 -
蔚功炎19141208564 ______[答案] 1.25=10/8 1.25*7.2=7.2*10/8=72/8=9 1.25*87*7.2 =87*9貌似没法化简了 直接算得783

施先钱3539脱式计算(能简算的要简算)7.23 - 1.25*4 - 0.7(1.79+1.2*0.1)÷0.2572*0.03+0.3*2.85.8÷[8*(1.8 - 1.3)]. -
蔚功炎19141208564 ______[答案] ①7.23-1.25*4-0.7 =7.23-5-0.7 =2.23-0.7 =1.53; ②(1.79+1.2*0.1)÷0.25 =(1.79+0.12)÷0.25 =1.91÷0.25 =7.64; ③72*0.03+0.3*2.8 =7.2*0.3+0.3*2.8 =(7.2+2.8)*0.3 =10*0.3 =3; ④5.8÷[8*(1.8-1.3)] =5.8÷[8*0.5] =5.8÷4 =1.45.

施先钱35391.25X7.2Ⅹ0.8简便方法? -
蔚功炎19141208564 ______ 你好,这道题的简便算法如下:1.25*7.2*0.8=1.25*0.8*7.2=1*7.2=7.2 望采纳.

施先钱35397.2÷1.25+0.8请问怎么简便 -
蔚功炎19141208564 ______ 7.2÷1.25÷0.8=7.2÷(1.25*0.8)=7.2