1. Вычислить и записать значения сумм: (2 + 4) + 4 = 8 + (6 + 4) = 1 + (9 + 1) = (1 + 6) + 2 = 3 + (14 - 4) = 3 + (4 + 6) = 2 + (3 + 7) = 10 + (9 + 1) = 9 + 1 + 10 = 14 - 10 5 + 6 8 + 7

Решение:

1. • \[(2 + 4) + 4 = 6 + 4 = 10\]
   • \[8 + (6 + 4) = 8 + 10 = 18\]
   • \[1 + (9 + 1) = 1 + 10 = 11\]
   • \[(1 + 6) + 2 = 7 + 2 = 9\]
   • \[3 + (14 - 4) = 3 + 10 = 13\]
   • \[3 + (4 + 6) = 3 + 10 = 13\]
   • \[2 + (3 + 7) = 2 + 10 = 12\]
   • \[10 + (9 + 1) = 10 + 10 = 20\]
   • \[9 + 1 + 10 = 10 + 10 = 20\]
   • \[14 - 10 = 4\]
   • \[5 + 6 = 11\]
   • \[8 + 7 = 15\]