А)) 1/2+1/3+1/5=15/30+10/30+6/30=31/30=1 1/30..........
б) 1/2-2/5-1/10=5/10-4/10-1/10=2/10=1/5.....................
в)1/3+3/4+5/12=4/12+9/12+5/12=18/12=1 6/12=1 1/2.......
г) 3/5+5/6+1/2=18/30+25/30+15/30=58/30=1 28/30=1 14/15..........
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