Question

2 задание.....................

Answer 1

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