1/8 + 3/8 + 7/20 + 3/20 = (1/8 + 3/8) + (7/20 + 3/20) = 4/8 + 10/20 = 1/2 + 1/2 = 1.
Итак, сумма дробей 1/8 + 7/20 + 3/8 + 3/20 равна 1.
1/8 + 3/8 + 7/20 + 3/20 = (1/8 + 3/8) + (7/20 + 3/20) = 4/8 + 10/20 = 1/2 + 1/2 = 1.
Итак, сумма дробей 1/8 + 7/20 + 3/8 + 3/20 равна 1.