Найдиправильный алгоритм сложения.

\(15 + 19 =\)

• \(=( (7 + 9) + 1) \times 2 = (((3 + 4) + 1) \times 2 + 1) \times 2 = ((((1 + 2) + 1) \times 2 \times 2 + 1) \times 2) = ((((1 + 1 \times 2) + 1) \times 2 \times 2 + 1) \times 2)\)
• \(=(8 + 9) \times 2 = (((3 + 4) + 1) \times 2 + 1) \times 2 = (((1 + 2) \times 2 + 1) \times 2 + 1) \times 2 = (((1 + 1 \times 2) \times 2 + 1) \times 2 + 1) \times 2\)
• \(=(7 + 9) \times 2 + 1 = ((3 + 4) + 1) \times 2 \times 2 + 1 = (((1 + 2) \times 2 + 1) + 1) \times 2 \times 2 + 1 = (((1 + 1 \times 2) \times 2 + 1) + 1) \times 2 \times 2 + 1\)
• \(=(8 + 9) \times 2 = (((3 + 4) + 1) \times 2 + 1) \times 2 = ((((1 + 2) + 1) \times 2 \times 2 + 1) \times 2) = ((((1 + 1) \times 2 + 1) \times 2 \times 2 + 1) \times 2)\)