Question

2 задание.....................

Answer 1

$4 \frac{5}{9} + 7 \frac{1}{6 } = 11 + ( \frac{5}{9} + \frac{1}{6} ) = \\ = 11 + \frac{5 \times 2 + 3 \times 1}{18} = \\ = 11 \frac{13}{18}$
$6 \frac{11}{12} + 8 \frac{13}{18} = \\ = 14 + (\frac{11}{12} + \frac{13}{18} ) = \\ = 14 + \frac{ 3 \times 11 + 13 \times 2}{36} = \\ = 14 + \frac{59}{36} = 15 \frac{23}{36}$
$2 \frac{3}{16} + 1 \frac{7}{24} + 3 \frac{1}{12} = \\ = 6 + ( \frac{3}{16} + \frac{7}{24} + \frac{1}{12} ) = \\ = 6 + ( \frac{3 \times 3 + 2 \times 7 + 1 \times 4}{48} ) = \\ = 6 \frac{27}{48} = 6 \frac{9}{16}$