Найдите сумму смешанных чисел: a) 2 3/7 + 4 1/7 = (2+4) + (3/7 + 1/7) = + = 6 4/7 б) 5 1/6 + 3 5/6 = в) 1 2/5 + 2 4/5 = (1+2) + ( ) = + 1 1/5 = г) 6 7/11 + 1 5/11 =

Ответ: а) 6 4/7; б) 8; в) 3 6/5 = 4 1/5; г) 8

1. a) 2 \(\frac{3}{7}\) + 4 \(\frac{1}{7}\) = (2+4) + (\(\frac{3}{7}\) + \(\frac{1}{7}\)) = 6 + \(\frac{4}{7}\) = 6 \(\frac{4}{7}\)
2. б) 5 \(\frac{1}{6}\) + 3 \(\frac{5}{6}\) = (5+3) + (\(\frac{1}{6}\) + \(\frac{5}{6}\)) = 8 + \(\frac{6}{6}\) = 8 + 1 = 9
3. в) 1 \(\frac{2}{5}\) + 2 \(\frac{4}{5}\) = (1+2) + (\(\frac{2}{5}\) + \(\frac{4}{5}\)) = 3 + \(\frac{6}{5}\) = 3 + 1 \(\frac{1}{5}\) = 4 \(\frac{1}{5}\)
4. г) 6 \(\frac{7}{11}\) + 1 \(\frac{5}{11}\) = (6+1) + (\(\frac{7}{11}\) + \(\frac{5}{11}\)) = 7 + \(\frac{12}{11}\) = 7 + 1 \(\frac{1}{11}\) = 8 \(\frac{1}{11}\)

Ответ: а) 6 4/7; б) 8; в) 3 6/5 = 4 1/5; г) 8