Вычислите дроби: 1/4+3/10 3/5-1/6 7/10-1/15 5/12+3/8
1/4+3/10= 5/20 + 6/20 =11/20 3/5-1/6 = 18/30 - 5/30 = 13/30 7/10 - 1/15 = 21/30 - 2/30=19/30 5/12 +3/8 = 10/24 + 9/24=19/24
Извините...