是三道提高题1,1996*19951995-1995*19962,(-3.14)*35.2+6.28*(-23.3)-

5个回答

  • 1,1996*19951995-1995*19961996

    =1996*1995*10001-1995*1996*10001

    =1996*1995*(10001-10001)

    =0

    2,(-3.14)*35.2+6.28*(-23.3)- 1.57*36.4

    =(-3.14)*35.2+(-3.14)*46.6+(-3.14)*18.2

    =(-3.14)*(35.2+46.6+18.2)

    =-3.14*100

    =-314

    3,(2008分之一-1)*(2007分之一-1)·····(三分之一-1)*(二分之一-1)

    =(-2007/2008)(-2006/2007)...(-2/3)(-1/2)

    =-1*2007/2008*2006/2007*...*2/3*1/2

    =-1/2008