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b) (4 5/6-3 1/2)*4/5 = (4 5/6 - 3 3/6) * 4/5 = 1 2/6 * 4/5 = 4/3 * 4/5 = 16/15 = 1 1/15
c) (4 4/5-3 1/2)*(0,15-0,07) = (4 8/10 - 3 5/10) * 8/100 = 1 3/10 * 2/25 =
= 13/10 * 2/25 = 13/5 * 1/25 = 13/125
d) 3 1/3*1 1/2+5/6 = 10/3 * 3/2 + 5/6 = 5 + 5/6 = 5 5/6
e) (4 3/8-3 1/2) *3/5 = (4 3/8 - 3 4/8) * 3/5 = (3 11/8 - 3 4/8) * 3/5 = 7/8 * 3/5 =
= 21/35
f) (5 3/8- 4 1/2) * (0,25-0,15) = (4 11/8 - 4 4/8) * 1/10 = 7/8 * 1/10 = 7/80
g) 8-1/4 = 7 4/4 - 1/4 = 7 3/4
h) 5-3/7 = 4 7/7 - 3/7 = 4 4/7
i) 10-3/5 = 9 5/5 - 3/5 = 9 2/5