找一下125×89乘以九的简便算法过程
=125*ï¼80+9ï¼*9
=125*80*9+125*9*9
=10000*9+125*ï¼8+1ï¼*9
=9*ï¼10000+1000+125ï¼
=11125*ï¼10-1ï¼
=111250-11125
=100125
=125*80*9+125*9*9
=10000*9+125*ï¼8+1ï¼*9
=9*ï¼10000+1000+125ï¼
=11125*ï¼10-1ï¼
=111250-11125
=100125
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