a) - \frac{5}{8} \cdot (-\frac{7}{12})= b) 38-(-16)= c) -7\frac{7}{24}-4\frac{13}{16}= a) -\frac{2}{7}-(-3)= b) 148-154= c) 9\frac{5}{6}-3\frac{2}{9}= c) \frac{5}{9}-2= d) -18,9-36,4= e) -3\frac{1}{14}-(-2\frac{5}{6})= c) \frac{7}{12}-(-\frac{8}{15})= d) -54,7-42,7= e) -3\frac{5}{6}-10\frac{3}{8}=

а) − \(\frac{5}{8}\) ⋅ (− \(\frac{7}{12}\)) = \(\frac{5 \cdot 7}{8 \cdot 12}\) = \(\frac{35}{96}\)

б) 38 − (−16) = 38 + 16 = 54

в) −7\(\frac{7}{24}\) − 4\(\frac{13}{16}\) = −7\(\frac{14}{48}\) − 4\(\frac{39}{48}\) = −11\(\frac{53}{48}\) = -12\(\frac{5}{48}\)

г) \(\frac{5}{9}\) − 2 = \(\frac{5}{9}\) − \(\frac{18}{9}\) = − \(\frac{13}{9}\) = -1\(\frac{4}{9}\)

д) −18,9 − 36,4 = -55,3

е) −3\(\frac{1}{14}\) − (−2\(\frac{5}{6}\)) = -3\(\frac{3}{42}\) + 2\(\frac{35}{42}\) = - \(\frac{129}{42}\) + \(\frac{119}{42}\) = -\(\frac{10}{42}\) = -\(\frac{5}{21}\)

а) −\(\frac{2}{7}\) − (−3) = -\(\frac{2}{7}\) + 3 = -\(\frac{2}{7}\) + \(\frac{21}{7}\) = \(\frac{19}{7}\) = 2\(\frac{5}{7}\)

б) 148 − 154 = -6

в) 9\(\frac{5}{6}\) − 3\(\frac{2}{9}\) = 9\(\frac{15}{18}\) - 3\(\frac{4}{18}\) = 6\(\frac{11}{18}\)

г) \(\frac{7}{12}\) − (−\(\frac{8}{15}\)) = \(\frac{7}{12}\) + \(\frac{8}{15}\) = \(\frac{35}{60}\) + \(\frac{32}{60}\) = \(\frac{67}{60}\) = 1\(\frac{7}{60}\)

д) −54,7 − 42,7 = -97,4

е) −3\(\frac{5}{6}\) − 10\(\frac{3}{8}\) = -3\(\frac{20}{24}\) − 10\(\frac{9}{24}\) = -13\(\frac{29}{24}\) = -14\(\frac{5}{24}\)