(25+2.5+0.25)*4.4怎么简算
问题描述:
(25+2.5+0.25)*4.4怎么简算
答
(25+2.5+0.25)*4.4
=25*4.4+2.5*4.4+0.25*4.4
=25*4*1.1+2.5*4*1.1+0.25*4*1.1
=100*1.1+10*1.1+1*1.1
=110+11+1.1
=122.1
答
把4.4拆成4*1.1
答
(25+2.5+0.25)*4.4
=25*4+2.5*4+0.25*4+25*0.4+2.5*0.4+0.25*0.4
=100+10+1+10+1+0.1
=122.1