如题所述
55*102-110
=55*102-55*2
=55*(102-2)
=55*100
=5500追问
=55*102-55*2
=55*(102-2)
=55*100
=5500追问
(2.25*2.7*5.1)/(8.1*0.25*1.7) 简便计算
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第1个回答 2011-05-12
55*102-110
=55x102-55x2
=55x(102-2)
=55x100
=5500
=55x102-55x2
=55x(102-2)
=55x100
=5500
第2个回答 2011-05-12
=55*(100+2)-110=55*100+55*2-110=5500+110-110=5500
第3个回答 2011-05-12
55*102-110=55*102-55*2=55*(102-2)=55*100=5500