1) -5/7+4/7 = (-5+4)/7 = -1/7
2) 5/12+(-1/12) = 5/12 - 1/12 = (5-1)/12 = 4/12 = 1/3
3) (-1/6)+1 = -1/6 + 6/6 = (-1+6)/6 = 5/6
4) 5/16+(-1/16) = 5/16 - 1/16 = 4/16 = 1/4
5) (-4) + 3 1/2 = (-4*2)/2 + (3*2+1)/2 = -8/2 + 7/2 = (-8+7)/2 = -1/2
1) -5/7+4/7 = (-5+4)/7 = -1/7
2) 5/12+(-1/12) = 5/12 - 1/12 = (5-1)/12 = 4/12 = 1/3
3) (-1/6)+1 = -1/6 + 6/6 = (-1+6)/6 = 5/6
4) 5/16+(-1/16) = 5/16 - 1/16 = 4/16 = 1/4
5) (-4) + 3 1/2 = (-4*2)/2 + (3*2+1)/2 = -8/2 + 7/2 = (-8+7)/2 = -1/2