-6 1/2-2 2/3 :{- 2/9}

-6½-8/3*(-9/2)=-6½+12=5½

-6 ½ - 2 ⅔ :{- ²/₉} = = -6 ½ -⁸/₃ * (-⁹/₂)= = -6 ½ + 12 = = 11 ²/₂ -6 ½ = = 5 ½

-6 9/18-2 12/18:(-4/18)= =- 6 9/18-48/18×(-18/4)=-6 9/18+12=5 9/18=5 1/2