数学题正负数加减法解答题(过程)

3个回答

  • (-7)-(+5)+(-4)-(-10)

    =-7-5-4+10

    =-12-4+10

    =-16+10

    =-6

    -2.4+3.5-4.6+3.5

    =1.1-4.6+3.5

    =-3.5+3.5

    =0

    四分之三-二分之七+(-六分之一)-(-三分之二)-1

    =12分之9-12分之42-12分之2+12分之8-1

    =-12分之33-12分之2+12分之8-1

    =-12分之35+12分之8-1

    =-12分之27-1

    =-12分之39

    =-4分之13

    (-8)+10+2+(-1)

    =-8+10+2-1

    =2+2-1

    =4-1

    =3