A) 17/81 - 1/9 = 17/81 - 9/81 = (17-9)/81 = 8/81
B) 9/14 - 35/98 = (97)/(147) - (352)/(982) = 63/98 - 70/98 = (63-70)/98 = -7/98
C) 3/5 + 16/65 = (313)/(513) + 16/65 = 39/65 + 16/65 = (39+16)/65 = 55/65 = 11/13
D) 9/54 +5/6 = (91)/(541) + 5/6 = 1/6 + 5/6 = (1+5)/6 = 6/6 = 1
E) 4/7 - 27/63 = (49)/(79) - 27/63 = 36/63 - 27/63 = (36-27)/63 = 9/63 = 1/7
A) 17/81 - 1/9 = 17/81 - 9/81 = (17-9)/81 = 8/81
B) 9/14 - 35/98 = (97)/(147) - (352)/(982) = 63/98 - 70/98 = (63-70)/98 = -7/98
C) 3/5 + 16/65 = (313)/(513) + 16/65 = 39/65 + 16/65 = (39+16)/65 = 55/65 = 11/13
D) 9/54 +5/6 = (91)/(541) + 5/6 = 1/6 + 5/6 = (1+5)/6 = 6/6 = 1
E) 4/7 - 27/63 = (49)/(79) - 27/63 = 36/63 - 27/63 = (36-27)/63 = 9/63 = 1/7