求（1+0.12+0.34）乘（0.12=0.34=0.56）-（1=0.12=0.34=0.56）乘（0.12+0.34）的

數(shù)學(xué)人氣：736 ℃時間：2019-11-15 07:39:42

優(yōu)質(zhì)解答

（1+0.12+0.34）乘（0.12=0.34=0.56）-（1=0.12=0.34=0.56）乘（0.12+0.34）?
應(yīng)該是（1+0.12+0.34）乘（0.12+0.34+0.56）-（1+0.12+0.34+0.56）乘（0.12+0.34）吧!
（1+0.12+0.34）乘（0.12+0.34+0.56）-（1+0.12+0.34+0.56）乘（0.12+0.34）
＝(1+0.12+0.34)*(0.12+0.34+0.56)-(0.12+0.34+0.56)*(0.12+0.34) -1*(0.12+0.34)
=[(1+0.12+0.34)-(0.12+0.34)]*(0.12+0.34+0.56) -(0.12+0.34)
=(0.12+0.34+0.56) -(0.12+0.34)
=0.56