=200x40+5x40 =8000+200 =8200
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14*102=14*【100+2】=14*100+14*2=1400+28=1428【*是乘号】
14x55解:简便计算=14x(50+5)=14x50+14x5=700+70=770祝天天向上.
14x101=14*(100+1)=14*100+14*1=1400+14=1414
14*35=7*2*35=7*(2*35)=7*70=490
14x0.25x48=14*6*(8*0.25)=84*2=168
14*105=14x100+14x5=1400+70=1470很高兴为你解答,希望能够帮助到你.基础教育团队祝你学习进步!不理解就追问,理解了请采纳!
14x35=7X2X35=7X70=490
是不是:350÷14=(70x5)÷14=70÷14x5=(14x5)÷14x5=5x5=25