1) 3/4 + 1/2 = 3/4 + 2/4 = 5/4
Утроенная сумма: 3 * (5/4) = 15/4
2) 3/4 3 + 1/2 2 = 9/4 + 2/2 = 9/4 + 4/4 = 13/4
Утроенная первая дробь: 3/4 3 = 9/4Удвоенная вторая дробь: 1/2 2 = 2/2 = 1
Сумма: 9/4 + 1 = 9/4 + 4/4 = 13/4
3) (3/4 + 1/2) (3/4 - 1/2) = (5/4) (1/4) = 5/16
1) 3/4 + 1/2 = 3/4 + 2/4 = 5/4
Утроенная сумма: 3 * (5/4) = 15/4
2) 3/4 3 + 1/2 2 = 9/4 + 2/2 = 9/4 + 4/4 = 13/4
Утроенная первая дробь: 3/4 3 = 9/4
Удвоенная вторая дробь: 1/2 2 = 2/2 = 1
Сумма: 9/4 + 1 = 9/4 + 4/4 = 13/4
3) (3/4 + 1/2) (3/4 - 1/2) = (5/4) (1/4) = 5/16