99x35x35用简便计算怎么算
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99x35x35用简便方法应该这样计算:
99x35x35
=(100-1)x35x35
=100x35x35-35x35
=35x3500-35x35
=(40-5)x3500-(40-5)x35
=40x3500-5x3500-40x35+5x35
=140000-17500-1400+175
= 121275
99x35x35
=(100-1)x35x35
=100x35x35-35x35
=35x3500-35x35
=(40-5)x3500-(40-5)x35
=40x3500-5x3500-40x35+5x35
=140000-17500-1400+175
= 121275
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