Выполни действие: 5 1/4 + 6 7/5

Привет! Давай решим эти примеры вместе. a) $5 \frac{1}{4} + 6 \frac{7}{5} = 5 + \frac{1}{4} + 6 + \frac{7}{5} = 11 + \frac{1}{4} + \frac{7}{5} = 11 + \frac{5}{20} + \frac{28}{20} = 11 + \frac{33}{20} = 11 + 1 \frac{13}{20} = 12 \frac{13}{20}$ б) $3 \frac{4}{10} - 1 \frac{2}{15} = 3 + \frac{4}{10} - (1 + \frac{2}{15}) = 3 + \frac{4}{10} - 1 - \frac{2}{15} = 2 + \frac{4}{10} - \frac{2}{15} = 2 + \frac{2}{5} - \frac{2}{15} = 2 + \frac{6}{15} - \frac{2}{15} = 2 + \frac{4}{15} = 2 \frac{4}{15}$ в) $4 \frac{9}{8} : 3 \frac{5}{6} = \frac{4*8+9}{8} : \frac{3*6+5}{6} = \frac{41}{8} : \frac{23}{6} = \frac{41}{8} * \frac{6}{23} = \frac{41*6}{8*23} = \frac{41*3}{4*23} = \frac{123}{92} = 1 \frac{31}{92}$ г) $5 \frac{8}{9} : 6 \frac{10}{3} = \frac{5*9+8}{9} : \frac{6*3+10}{3} = \frac{53}{9} : \frac{28}{3} = \frac{53}{9} * \frac{3}{28} = \frac{53*3}{9*28} = \frac{53}{3*28} = \frac{53}{84}$ д) $7 \frac{2}{6} * 1 \frac{3}{7} = \frac{7*6+2}{6} * \frac{1*7+3}{7} = \frac{44}{6} * \frac{10}{7} = \frac{44*10}{6*7} = \frac{440}{42} = \frac{220}{21} = 10 \frac{10}{21}$ е) $5 \frac{6}{8} * 6 \frac{1}{10} = \frac{5*8+6}{8} * \frac{6*10+1}{10} = \frac{46}{8} * \frac{61}{10} = \frac{46*61}{8*10} = \frac{2806}{80} = \frac{1403}{40} = 35 \frac{3}{40}$