第1个回答 2009-03-01
98*125
=(100-2)*5*100/4
=(100*5/4-2*5/4)*100
=(125-2.5)*100
=122.5*100
=12250
第2个回答 2009-03-01
98*125
=(100-2)*125
=100*125-2*125
=12500-250
=12250
100x125-2x125
=12500-250
=12250
运用转化的思想
第3个回答 2009-03-01
100x125-2x125
=12500-250
=12250本回答被提问者采纳
第4个回答 2009-03-01
98*125
=(100-2)*125
=100*125-2*125
=12500-250
=12250
第5个回答 2009-03-01
125*100-125*2=12250