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125x15x18脱式计算

125x15x18脱式计算 125x15x18 =125*15*10+125*15*8 =18750+15000 =33750

125×15×4 =(25×5)×15×4 =(25×4)×(5×15) =100×75 =7500

解:88x125 =8x125x11 =1000x11 =11000 分析:本题简便计算的关键在于要利用8x125=1000的常用式子,然后将88分解成8x11.而后就可算出结果是11000.

125×39×2×8=125×8×39×2=1000×78=78000

125x64 =125x8x8 =1000x8 =8000

125X81一125用简便运算用脱式计算 =125x(81-1) =125x80 =10000

=125×8×11 =1000×11 =11000

16乘以25乘以125 =2×8×25×125 =(2×25)×(8×125) =50×1000 =50000 供参考,有疑问请追问

125x56 =125×8×7 =1000×7 =7000

(40 8)x125的脱式计算 (40 8)x125 =125*40+125*8 =5000+1000 =6000

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