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35×22的简便算法,脱式算

35×2×11 =70×11 =770

35×4×25×20 =(35×20)×(4×25) =700×100 =70000

原式 =35x(8+3-1) =35x(11-1) =35x10 =350 供参考。

脱式计算的简便算法 35×22 =35×2×11 =70×11 =770

35×16+35×24 =35x(16+24) =35x40 =1440

(99加1)乘35

0.4×125×25×0.8 =(0.4×25)×(125×0.8) =10×100=1000 1.25×(8+10) =1.25×8+1.25×10 =10+12.5=22.5 9123-(123+8.8) =9123-123-8.8 =9000-8.8 =8991.2 1.24×8.3+8.3×1.76 =8.3×(1.24+1.76) =8.3×3=24.9 9999×1001 =9999×(1000+1) =9999×1000+9999×1 ...

(253+22)÷21的简便计算是什么,脱式计算? (253+22)÷21 =275÷21 = 不是整数 、核实数据

脱式计算

11/28×25×7/22 =11/22×7/28×25 =1/2×1/4×25 =1/8×25 =3又1/8

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