2) 6 1/4 * 8 - 3 2/3 * 5 1/2 + 2 2/5 * 4 7/12

Решение:

• 1) 6 \(\frac{1}{4}\) = \(\frac{25}{4}\)
• 2) \(\frac{25}{4}\) \(\times\) 8 = \(\frac{25 \times 8}{4}\) = 25 \(\times\) 2 = 50
• 3) 3 \(\frac{2}{3}\) = \(\frac{11}{3}\)
• 4) 5 \(\frac{1}{2}\) = \(\frac{11}{2}\)
• 5) \(\frac{11}{3}\) \(\times\) \(\frac{11}{2}\) = \(\frac{121}{6}\)
• 6) 2 \(\frac{2}{5}\) = \(\frac{12}{5}\)
• 7) 4 \(\frac{7}{12}\) = \(\frac{48+7}{12}\) = \(\frac{55}{12}\)
• 8) \(\frac{12}{5}\) \(\times\) \(\frac{55}{12}\) = \(\frac{12 \times 55}{5 \times 12}\) = \(\frac{55}{5}\) = 11
• 9) 50 - \(\frac{121}{6}\) = \(\frac{300-121}{6}\) = \(\frac{179}{6}\)
• 10) \(\frac{179}{6}\) + 11 = \(\frac{179 + 66}{6}\) = \(\frac{245}{6}\)

Ответ: \(\frac{245}{6}\)