1)3\8 * (-4)+5= 2)5\9 : (-1\3)-7= 3)2\5*(-3)-4\5= 4)5\12:1\4- (-1\3)= 5) (1\2)*(-4)-5= 6)4\9 : (-2\3)+1=

1) 3/8 * (-4) + 5 = -12/8 + 5 = -3/2 + 5 = -3/2 + 10/2 = 7/2 = 3 1/2.

2) 5/9 : (-1/3) – 7 = 5/9 * (-3/1) – 7 = -15/9 - 7 = -5/3 – 7 = -5/3 – 21/3 = -26/3 = -8 2/3.

3) 2/5 * (-3) -4/5 = -6/5 - 4/5 = -10/5 = -2.

4) 5/12 : 1/4  - (-1/3) = 5/12 * 4/1 – (-1/3) = 20/12 – (-1/3) = 5/3 – (-1/3) = 6/3 = 2.

5) (1/2) * (-4) – 5= -4/2 - 5 = -2 – 5 = -7.

6) 4/9 : (-2/3) + 1 = 4/9 * (-3/2) + 1 = -12/18 + 1 = -2/3 + 1 = -2/3 + 3/3 = 1/3.