有理数的乘法问题今天就要很急!57x55/56+27x27/28-7x(-22/7)+19x(-22/7)-5x(-22

2个回答

  • 原式=[56+1]*55/56+(28-1)27/28

    =56*55/56+55/56+28*27/28-27/28

    =55+55/56+27-27/28

    =82+1/56

    =82又1/56

    原式=(-22/7)×[(-7)+19-5]

    =(-22/7)×7

    =-22

    原式=(7/9×36-5/6×36+7/18×36)-[6×(1.45+3.95)]

    =(略,因为太麻烦了,Sorry)

    =27

    原式=[-5/12-5/6+(2/3+3/8)]x24x(5/9-2/9+2/3)

    =(同略,真滴很Sorry)

    =-5