а) 1/5 + 3/4 + 1/5 + 1/4 = 4/5 + 2/4 = 4/5 + 1/2 = 8/10 + 5/10 = 13/10.
б) 11/12 + 7/10 + 3/100 + 1/12 = 110/120 + 84/120 + 3/100 + 10/120 = 204/120 + 3/100 = 17/10 + 3/100 = 170/100 + 3/100 = 173/100.
в) 12/17 + 15/24 + 3/8 + 5/17 = 12/17 + 15/24 + 3/8 + 5/17 = 1008/1424 + 1272/1424 + 536/1424 + 680/1424 = 3496/1424 = 281/117.
г) 3/7 + 5/9 + 4/9 + 4/7 = 27/63 + 35/63 + 28/63 + 36/63 = 126/63 = 2.
а) 1/5 + 3/4 + 1/5 + 1/4 = 4/5 + 2/4 = 4/5 + 1/2 = 8/10 + 5/10 = 13/10.
б) 11/12 + 7/10 + 3/100 + 1/12 = 110/120 + 84/120 + 3/100 + 10/120 = 204/120 + 3/100 = 17/10 + 3/100 = 170/100 + 3/100 = 173/100.
в) 12/17 + 15/24 + 3/8 + 5/17 = 12/17 + 15/24 + 3/8 + 5/17 = 1008/1424 + 1272/1424 + 536/1424 + 680/1424 = 3496/1424 = 281/117.
г) 3/7 + 5/9 + 4/9 + 4/7 = 27/63 + 35/63 + 28/63 + 36/63 = 126/63 = 2.