Вычислите: а) 8/13 − 1/26; б) 7/15 − 7/30; в) 2/19 − 1/38; г) 5/7 − 3/14; д) 4/21 − 1/7; е) 7/20 + 11/50; ж) 5/8 − 2/7; з) 3/4 + 5/12; и) 15/23 − 27/46; к) 9/25 − 14/117; л) 17/35 − 13/28; м) 1 − 2/7; н) 5 1/9 + 3 2/5; о) 3 3/8 + 1 5/12; п) 62 2/3 − 3 5/8; р) 12 − 10 7/9; с) 18 − 11 8/13; т) 15 3/17 − 4.
- \(\frac{8}{13}-\frac{1}{26}=\frac{16}{26}-\frac{1}{26}=\frac{15}{26}\).
- \(\frac{7}{15}-\frac{7}{30}=\frac{14}{30}-\frac{7}{30}=\frac{7}{30}\).
- \(\frac{2}{19}-\frac{1}{38}=\frac{4}{38}-\frac{1}{38}=\frac{3}{38}\).
- \(\frac{5}{7}-\frac{3}{14}=\frac{10}{14}-\frac{3}{14}=\frac{1}{2}\).
- \(\frac{4}{21}-\frac{1}{7}=\frac{4}{21}-\frac{3}{21}=\frac{1}{21}\).
- \(\frac{7}{20}+\frac{11}{50}=\frac{35}{100}+\frac{22}{100}=\frac{57}{100}\).
- \(\frac{5}{8}-\frac{2}{7}=\frac{35}{56}-\frac{16}{56}=\frac{19}{56}\).
- \(\frac{3}{4}+\frac{5}{12}=\frac{9}{12}+\frac{5}{12}=\frac{7}{6}=1\frac{1}{6}\).
- \(\frac{15}{23}-\frac{27}{46}=\frac{30}{46}-\frac{27}{46}=\frac{3}{46}\).
- \(\frac{9}{25}-\frac{14}{117}=\frac{1053}{2925}-\frac{350}{2925}=\frac{703}{2925}\).
- \(\frac{17}{35}-\frac{13}{28}=\frac{68}{140}-\frac{65}{140}=\frac{3}{140}\).
- \(1-\frac{2}{7}=\frac{5}{7}\).
- \(5\frac{1}{9}+3\frac{2}{5}=8+\frac{5}{45}+\frac{18}{45}=8\frac{23}{45}\).
- \(3\frac{3}{8}+1\frac{5}{12}=4+\frac{9}{24}+\frac{10}{24}=4\frac{19}{24}\).
- \(62\frac{2}{3}-3\frac{5}{8}=59+\frac{16}{24}-\frac{15}{24}=59\frac{1}{24}\).
- \(12-10\frac{7}{9}=1\frac{2}{9}\).
- \(18-11\frac{8}{13}=6\frac{5}{13}\).
- \(15\frac{3}{17}-4=11\frac{3}{17}\).