K) ) 3 r) 7-13)5-2M) 7 -3; p) 5 13:01

Выполним действия:

г) $$7 - 1\frac{7}{8} = 7 - \frac{15}{8} = \frac{56}{8} - \frac{15}{8} = \frac{41}{8} = 5\frac{1}{8}$$

з) $$5\frac{7}{15} - \frac{3}{20} = \frac{82}{15} - \frac{3}{20} = \frac{82 \cdot 4}{15 \cdot 4} - \frac{3 \cdot 3}{20 \cdot 3} = \frac{328}{60} - \frac{9}{60} = \frac{319}{60} = 5\frac{19}{60}$$

л) $$5\frac{7}{8} - \frac{9}{10} = \frac{47}{8} - \frac{9}{10} = \frac{47 \cdot 5}{8 \cdot 5} - \frac{9 \cdot 4}{10 \cdot 4} = \frac{235}{40} - \frac{36}{40} = \frac{199}{40} = 4\frac{39}{40}$$

м) $$7\frac{5}{12} - 3\frac{2}{9} = \frac{89}{12} - \frac{29}{9} = \frac{89 \cdot 3}{12 \cdot 3} - \frac{29 \cdot 4}{9 \cdot 4} = \frac{267}{36} - \frac{116}{36} = \frac{151}{36} = 4\frac{7}{36}$$

п) $$2\frac{3}{10} - 1\frac{11}{15} = \frac{23}{10} - \frac{26}{15} = \frac{23 \cdot 3}{10 \cdot 3} - \frac{26 \cdot 2}{15 \cdot 2} = \frac{69}{30} - \frac{52}{30} = \frac{17}{30}$$

р) $$5\frac{3}{8} - \frac{5}{12} = \frac{43}{8} - \frac{5}{12} = \frac{43 \cdot 3}{8 \cdot 3} - \frac{5 \cdot 2}{12 \cdot 2} = \frac{129}{24} - \frac{10}{24} = \frac{119}{24} = 4\frac{23}{24}$$

Ответ:

г) $$5\frac{1}{8}$$

з) $$5\frac{19}{60}$$

л) $$4\frac{39}{40}$$

м) $$4\frac{7}{36}$$

п) $$\frac{17}{30}$$

р) $$4\frac{23}{24}$$