a) 3/7+(-5/2)+(-3/5) b) (-4/3)+(-2/5)+(-3/2) c) 4/5-(-2/7)-7/10 d) 2/3-[(-7/4)-(1/2+3/8)]

a) 3/7+(-5/2)+(-3/5)

= 3/7 – 5/2 -3/5

= 30/70 – 175/70 – 42/70

= -187/70

b) (-4/3)+(-2/5)+(-3/2)

= (-26/15) + (-3/2)

= -97/30

c) 4/5-(-2/7)-7/10

= $\frac{56+20+(-49)}{70}$

= $\frac{27}{70}$ 

d) 2/3-[(-7/4)-(1/2+3/8)]

= 2/3 – 21/8

= -47/24