a) 5 2/5 - 1,25 = 5,4 - 1,25 = 4,15 albo = 5 2/5 - 1 1/4 = 5 8/20 - 1 5/20 = 4 3/20 0,9 - 3/8 = 0,9 - 0,375 = 0,525 b) 3,75 - 1 1/6 = 3 3/4 - 1 1/6 = 3 9/12 - 1 2/12 = 2 7/12 4 2/3 - 1,5 = 4 2/3 - 1 1/2 = 4 4/6 - 1 3/6 = 3 1/6 6 1/7 - 2 2/5 = 6 5/35 - 2 14/35 = 5 40/35 - 2 14/35 = 3 26/35 1/7zb a) 1/4 + 3/4 = 4/4 = 1 b) 3/5 + 4/5 = 7/5 = 1 2/5 c) 5/7 + 1 4/7 = 1 9/7 = 2 2/7 d) 2 5/6 + 3 1/6 = 5 6/6 = 6 e) 5/12 + 7/12 + 9/12 = 12/12 + 9/12 = 1 + 3/4 f) 2 3/8 + 3 5/8 + 4 7/8 = 5 8/8 + 4 7/8 = 6 + 4 7/8 = 10 7/8
