如题所述
第1个回答 2010-11-18
125*78*9=(100+25)*(80-2)*(10-1)
=(8000-200+2000-50)*(10-1)
=(10000-250)*(10-1)
=100000-10000-2500+250
=90000-2500+250
=87500+250
=87750本回答被提问者和网友采纳
=(8000-200+2000-50)*(10-1)
=(10000-250)*(10-1)
=100000-10000-2500+250
=90000-2500+250
=87500+250
=87750本回答被提问者和网友采纳
第2个回答 2010-11-18
125*9*(70+8)
=125*9*8+125*9*70
=9000+125*70*(8+1)
=9000+70000+8750
=87750
=125*9*8+125*9*70
=9000+125*70*(8+1)
=9000+70000+8750
=87750