0.45*72+45*0.18+4.5简便方法的答案

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0.45*72+45*0.18+4.5简便方法的答案0.45*72+45*0.18+4.5简便方法的答案0.45*72+45*0.18+4.5简便方法的答案0.45*72+45*0.18+4.5=0.

0.45*72+45*0.18+4.5简便方法的答案
0.45*72+45*0.18+4.5简便方法的答案

0.45*72+45*0.18+4.5简便方法的答案
0.45*72+45*0.18+4.5
=0.45*72+0.45*0.18*100+0.45*10
=0.45*72+0.45*18+0.45*10
=0.45*(72+18+10)
=0.45*100
=45