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37x45十37x55简便方法

原式=(45+55)x37=100x37=3700 供参考.

=37x(45+55) =37x100 =3700

45=50-5,55=50+5,原式=(50-5)x(50+5)x37=(50^2-5^2)x(40-3)=2475x(40-3)=91575

=45x437+37x455-37x2=37x(45+455)-37x2=37x500-37x2=(40-3)x500-(40-3)x2=40x500-3x500-40x2+6=20000-1500-80+6=18426

45x53十55x55=45x53十55x(53+2)=45x53十55x53+55x2=(45+55)x53+55x2=100x53+110=5410

37X49十37X51=37x(49+51)=37x100=3700

44/45*37=(1-1/45)*37=1*37-1/45*37=37-37/45=36又8/45就是这样,欢迎追问,嘻嘻

=37*(45+54+1)=37*100=3700

=37X(46+55-1) =37*100 =3700

原式=37(45+55)=37*100=3700.

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