6.59 Найдите разность: a) 7 3/5 - 1 2/5; в) 6 - 2/5; д) 4 1/7 - 1 4/7; ж) 4 1/2 - 3 1/4; б) 28 6/13 - 7 1/13; г) 21 - 5/9; e) 12 2/5 - 1 4/5; з) 5 1/7 - 3 20/21.

Ответ:

а) 7 \(\frac{3}{5}\) - 1 \(\frac{2}{5}\) = 6 \(\frac{1}{5}\)

б) 28 \(\frac{6}{13}\) - 7 \(\frac{1}{13}\) = 21 \(\frac{5}{13}\)

в) 6 - \(\frac{2}{5}\) = 5 \(\frac{5}{5}\) - \(\frac{2}{5}\) = 5 \(\frac{3}{5}\)

г) 21 - \(\frac{5}{9}\) = 20 \(\frac{9}{9}\) - \(\frac{5}{9}\) = 20 \(\frac{4}{9}\)

д) 4 \(\frac{1}{7}\) - 1 \(\frac{4}{7}\) = 3 \(\frac{8}{7}\) - \(\frac{4}{7}\) = 3 \(\frac{4}{7}\)

е) 12 \(\frac{2}{5}\) - 1 \(\frac{4}{5}\) = 11 \(\frac{7}{5}\) - \(\frac{4}{5}\) = 11 \(\frac{3}{5}\)

ж) 4 \(\frac{1}{2}\) - 3 \(\frac{1}{4}\) = 4 \(\frac{2}{4}\) - 3 \(\frac{1}{4}\) = \(\frac{1}{4}\)

з) 5 \(\frac{1}{7}\) - 3 \(\frac{20}{21}\) = 5 \(\frac{3}{21}\) - 3 \(\frac{20}{21}\) = 4 \(\frac{24}{21}\) - 3 \(\frac{20}{21}\) = 1 \(\frac{4}{21}\)