1) (-5/8)*(-4/5)*(-3/4)*(-2/3)*(-1/2)
1. (-5/8)*(-4/5)=4/8
2. 4/8*(-3/4)=-3/8
3. -3/8*(-2/3)=2/8
4. 2/8*(-1/2)=-1/8
2)(-7/12)*(-6/7)*(-5/6)*(-4/5)+2/3
1. (-7/12)*(-6/7)=6/12
2. 6/12*(-5/6)=-5/12
3.-5/12*(-4/5)=4/12=1/3
4. 1/3+2/3=3/3=1
(-11/15)*(-10/11)*(-9/10)+(-7/9)*(-6/7)+4/15
1. (-11/15)*(-10/11)=10/15
2. 10/15*(-9/10)=-9/15
3. (-7/9)*(-6/7)=6/9
4. -9/15+6/9=-27/45+30/45=3/45=1/15
5.1/15+4/15=5/15=1/3