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35×22的简便算法,脱式算

35×2×11 =70×11 =770

原式=9×11×2×11+3×11×4×11 =(9×2)×(11×11)+(3×4)×(11×11) =18×121+12×121 =(18+12)×121 =30×121 =3630楼上说的不对

25×36简便算法脱式计算 25×36 =25*4*9 =100*9 =900

原式=75x4.68+4.68x35-4.68x10 =(75+35-10)x4.68 =100x4.68 =468

11×22+0.22×3300+330×4.4 =11×22+22×33+33×44 =11×22+22×33+33×2×22 =(11+33+66)×22 =110×22 =2420 或: 11×22+0.22×3300+330×4.4 =11×22+22×33+33×44 =(11+33)×22+33×44 =44×22+33×44 =44×(22+33) =44×55 =2420 .把小数变成正数,灵活运...

99×38加38用简便算法算脱式计算 99*38+38 =38*(99+1) =38*100 =3800

结果是3又27分之25,具体过程如下: 5-7/27-27分之22 =5-(7/27+27分之22) =5-27分之29 =5-1又27分之2 =3又27分之25

125x64 =125x8x8 =1000x8 =8000

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