-3/5+(-2.2/5), -1+5/14, 4+(-6.1/2), 2-5/8, 3/4-1, -1+3/7

-3/5 + (-2.2/5) = -1.04; -1 + 5/14 = -0.64; 4 + (-6.1/2) = 1.9; 2 - 5/8 = 1.375; 3/4 - 1 = -0.25; -1 + 3/7 = -0.571.