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125x 36x8 的简便计算

125 x (7 x 8)= 125 x 7 x 8= 125 x 8 x 7= 1000 x 7= 7000

(36*125)*(3*8)=36*125*3*8=36*3*(125*8)=108*1000=108000

125x21x8的简便计算;125x21x8=125*8*21=1000*21=21000

125x(63x8)=125x8x63=1000x63=63000

125x36x8用简便方法计算=125*8*36=1000*36=36000

用乘法交换律简算 原式=125*8*70 =1000*70 =70000

8x(36x125)=36x(8x125)=36x1000=36000

125x(47x8)=125x8x47=1000x47=47000

125*45*8=(125*8)*45=1000*45=45000

=(125*80)*8=10000*8=80000

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