Вычислите: а) 25/28 - 18/35; б) 40/63 - 35/72; в) 22/21 - 21/22; г) 140/143 - 41/156; д) 43/126 - 41/135; е) 239/240 - 229/288.

а) \(\frac{25}{28} - \frac{18}{35} = \frac{125}{140} - \frac{72}{140} = \frac{53}{140}\)

б) \(\frac{40}{63} - \frac{35}{72} = \frac{320}{504} - \frac{245}{504} = \frac{75}{504} = \frac{25}{168}\)

в) \(\frac{22}{21} - \frac{21}{22} = \frac{484}{462} - \frac{441}{462} = \frac{43}{462}\)

г) \(\frac{140}{143} - \frac{41}{156} = \frac{1680}{1716} - \frac{451}{1716} = \frac{1229}{1716}\)

д) \(\frac{43}{126} - \frac{41}{135} = \frac{645}{1890} - \frac{574}{1890} = \frac{71}{1890}\)

е) \(\frac{239}{240} - \frac{229}{288} = \frac{1434}{1440} - \frac{1145}{1440} = \frac{289}{1440}\)

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