1) (9 4/5 - 3.75) - (10 - 8 1/20) = (49/5 - 3 3/4) - 1 19/20 = 196/20 - 75/20 - 39/20 = 82/20 = 4 1/10 = 4.1
2) (7.85 - 1 3/20) - (5 9/25 - 2.16) = (7 17/20 - 1 3/20) - (5 9/25 - 2 4/25) = 6 14/20 - 3 5/25 = 6 7/10 - 3 2/10 = 3 1/2 = 3.5
1) (9 4/5 - 3.75) - (10 - 8 1/20) = (49/5 - 3 3/4) - 1 19/20 = 196/20 - 75/20 - 39/20 = 82/20 = 4 1/10 = 4.1
2) (7.85 - 1 3/20) - (5 9/25 - 2.16) = (7 17/20 - 1 3/20) - (5 9/25 - 2 4/25) = 6 14/20 - 3 5/25 = 6 7/10 - 3 2/10 = 3 1/2 = 3.5