1) \(\frac{4}{15} + \frac{13}{36} + \frac{1}{15} + \frac{5}{36} = (\frac{4}{15} + \frac{1}{15}) + (\frac{13}{36} + \frac{5}{36}) = \frac{4+1}{15} + \frac{13+5}{36} = \frac{5}{15} + \frac{18}{36} = \frac{1}{3} + \frac{1}{2} = \frac{1 \cdot 2}{3 \cdot 2} + \frac{1 \cdot 3}{2 \cdot 3} = \frac{2}{6} + \frac{3}{6} = \frac{2+3}{6} = \frac{5}{6}\)
Ответ: \(\frac{5}{6}\)
2) \(2 \frac{5}{18} + 4 \frac{1}{48} + 6 \frac{7}{48} + 3 \frac{1}{18} = (2 \frac{5}{18} + 3 \frac{1}{18}) + (4 \frac{1}{48} + 6 \frac{7}{48}) = (2 + 3) + (\frac{5}{18} + \frac{1}{18}) + (4 + 6) + (\frac{1}{48} + \frac{7}{48}) = 5 + \frac{5+1}{18} + 10 + \frac{1+7}{48} = 5 + \frac{6}{18} + 10 + \frac{8}{48} = 5 + \frac{1}{3} + 10 + \frac{1}{6} = 15 + \frac{1}{3} + \frac{1}{6} = 15 + \frac{1 \cdot 2}{3 \cdot 2} + \frac{1}{6} = 15 + \frac{2}{6} + \frac{1}{6} = 15 + \frac{2+1}{6} = 15 + \frac{3}{6} = 15 + \frac{1}{2} = 15 \frac{1}{2}\)
Ответ: 15 \(\frac{1}{2}\)