376. Выполните сложение: ① a) 3 \frac{2}{7} + 5 \frac{3}{14}; б) 5 \frac{7}{8} + 2 \frac{5}{12}; в) 7 \frac{3}{8} + 1 \frac{5}{6}; г) 1 \frac{1}{9} + 2 \frac{3}{5}; д) 7 \frac{2}{9} + 4; е) 8 \frac{3}{5} + \frac{1}{15}; ж) 7 + 3 \frac{5}{8}; з) \frac{2}{3} + 4 \frac{3}{5}. 377. Выполните вычитание: a) 1 - \frac{3}{4}; б) 2 - \frac{5}{6}; в) 9 - \frac{11}{12}; г) 7 - 1 \frac{7}{8}; д) 5 - 2 \frac{2}{5}; е) 6 - 5 \frac{5}{8}; ж) 8 \frac{3}{11} - 4; з) 5 \frac{7}{15} - \frac{3}{20}; и) 1 \frac{5}{12} - \frac{9}{10}; к) 6 \frac{3}{10} - \frac{11}{15}; л) 5 \frac{7}{8} - \frac{9}{10}; м) 7 \frac{5}{12} - 3 \frac{2}{9}; н) 10 \frac{1}{2} - 4 \frac{9}{14}; о) 7 \frac{4}{7} - 5 \frac{7}{9}; п) 2 \frac{3}{10} - 1 \frac{11}{15}; р) 5 \frac{3}{8} - 3 \frac{5}{6}

Ответ:

376. Выполните сложение:

① a) 3 \frac{2}{7} + 5 \frac{3}{14} = 3 \frac{4}{14} + 5 \frac{3}{14} = 8 \frac{7}{14} = 8 \frac{1}{2}

б) 5 \frac{7}{8} + 2 \frac{5}{12} = 5 \frac{21}{24} + 2 \frac{10}{24} = 7 \frac{31}{24} = 8 \frac{7}{24}

в) 7 \frac{3}{8} + 1 \frac{5}{6} = 7 \frac{9}{24} + 1 \frac{20}{24} = 8 \frac{29}{24} = 9 \frac{5}{24}

г) 1 \frac{1}{9} + 2 \frac{3}{5} = 1 \frac{5}{45} + 2 \frac{27}{45} = 3 \frac{32}{45}

д) 7 \frac{2}{9} + 4 = 11 \frac{2}{9}

е) 8 \frac{3}{5} + \frac{1}{15} = 8 \frac{9}{15} + \frac{1}{15} = 8 \frac{10}{15} = 8 \frac{2}{3}

ж) 7 + 3 \frac{5}{8} = 10 \frac{5}{8}

з) \frac{2}{3} + 4 \frac{3}{5} = \frac{10}{15} + 4 \frac{9}{15} = 4 \frac{19}{15} = 5 \frac{4}{15}

377. Выполните вычитание:

a) 1 - \frac{3}{4} = \frac{4}{4} - \frac{3}{4} = \frac{1}{4}

б) 2 - \frac{5}{6} = \frac{12}{6} - \frac{5}{6} = \frac{7}{6} = 1 \frac{1}{6}

в) 9 - \frac{11}{12} = 8 \frac{12}{12} - \frac{11}{12} = 8 \frac{1}{12}

г) 7 - 1 \frac{7}{8} = 6 \frac{8}{8} - \frac{7}{8} = 6 \frac{1}{8}

д) 5 - 2 \frac{2}{5} = 4 \frac{5}{5} - 2 \frac{2}{5} = 2 \frac{3}{5}

е) 6 - 5 \frac{5}{8} = 5 \frac{8}{8} - 5 \frac{5}{8} = \frac{3}{8}

ж) 8 \frac{3}{11} - 4 = 4 \frac{3}{11}

з) 5 \frac{7}{15} - \frac{3}{20} = 5 \frac{28}{60} - \frac{9}{60} = 5 \frac{19}{60}

и) 1 \frac{5}{12} - \frac{9}{10} = 1 \frac{25}{60} - \frac{54}{60} = \frac{85}{60} - \frac{54}{60} = \frac{31}{60}

к) 6 \frac{3}{10} - \frac{11}{15} = 6 \frac{9}{30} - \frac{22}{30} = 5 \frac{39}{30} - \frac{22}{30} = 5 \frac{17}{30}

л) 5 \frac{7}{8} - \frac{9}{10} = 5 \frac{35}{40} - \frac{36}{40} = 4 \frac{75}{40} - \frac{36}{40} = 4 \frac{39}{40}

м) 7 \frac{5}{12} - 3 \frac{2}{9} = 7 \frac{15}{36} - 3 \frac{8}{36} = 4 \frac{7}{36}

н) 10 \frac{1}{2} - 4 \frac{9}{14} = 10 \frac{7}{14} - 4 \frac{9}{14} = 9 \frac{21}{14} - 4 \frac{9}{14} = 5 \frac{12}{14} = 5 \frac{6}{7}

о) 7 \frac{4}{7} - 5 \frac{7}{9} = 7 \frac{36}{63} - 5 \frac{49}{63} = 6 \frac{99}{63} - 5 \frac{49}{63} = 1 \frac{50}{63}

п) 2 \frac{3}{10} - 1 \frac{11}{15} = 2 \frac{9}{30} - 1 \frac{22}{30} = 1 \frac{39}{30} - 1 \frac{22}{30} = \frac{17}{30}

р) 5 \frac{3}{8} - 3 \frac{5}{6} = 5 \frac{9}{24} - 3 \frac{20}{24} = 4 \frac{33}{24} - 3 \frac{20}{24} = 1 \frac{13}{24}

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