plizaso

1) 1/2-= 2) 1/2x5= 3) (-7)x3/4= 4) 5/12x(-3)= 5) 1/2x4/3= 6) (-4/3)x(-3/4)= 7) 2/3x(-8/5)x(9/10)= 8) 1/3/2/5= 9) 5/9/(-10/3)= 10) (-5/6)3