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64 15 15简便计算

=64-64+15+15 =15+15=30

15乘202=15x(200+2)=3030; 86乘99=86x(100-1)=8514; 99乘38+38=38x(99+1)=3800; 64乘64+36乘64=64x(36+64)=6400

64x15=(60+4)x15=60x15+4x15=900+60=960

你好,这道题的简便算法如下:64*15-14*15=(64-14)*15=50*15=750 望采纳.

64*15-14*15简便计算过程如下64*15-14*15 =15*(64-14) =15*50 =750

64-15+64-15 =64X2-15X2 =(64-15)X2 =49X2 =98

16x16=156

64一15十64一15 简便方法计算64一15十64一15=64+64-(15+15)=128-30=98

(64-14)*15=50x15=750

=64x15-64x5=64x(15-5)=64x10=640

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