Question

5/6+ 3/11 и 2 1/20-6 9/40 , 5 1/7+7 13/21 СРОЧНО ДАЮ 20 баллов

Answer 1

$\frac{5}{6} + \frac{3}{11} = \frac{55 + 18}{66} = \frac{73}{66} = 1\frac{7}{66}$

$2 \frac{1}{20} - 6 \frac{9}{40} = \frac{41}{20} - \frac{249}{40} = \frac{82 - 249}{40} = - \frac{167}{40} = - 4 \frac{7}{40}$

$5 \frac{1}{7} + 7 \frac{13}{21} = \frac{36}{7} + \frac{160}{21} = \frac{108 + 160}{21} = \frac{268}{21} = 12 \frac{16}{21}$