89×3/86
=(86+3)×3/86 ..........拆数
=86×3/86+3×3/86..........乘法的分配律
=3+9/86
=3又9/8689x3/86
=(86+3)×3/86
=86×3/86+3×3/86
=3+9/86
=3又9/86
89x86分之3怎样简便运算
89x3/86
=(86+3)×3/86
=86×3/86+3×3/86
=3+9/86
=3又9/86
89×3/86
=(86+3)×3/86 ..........拆数
=86×3/86+3×3/86..........乘法的分配律
=3+9/86
=3又9/8689x3/86
=(86+3)×3/86
=86×3/86+3×3/86
=3+9/86
=3又9/86
89x86分之3怎样简便运算
89x3/86
=(86+3)×3/86
=86×3/86+3×3/86
=3+9/86
=3又9/86