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МатематикаВопрос:
Выполните сложение Вариант 2 1) \(\frac{1}{1} + \frac{1}{12} =\) 2) \(\frac{1}{6} + \frac{1}{3} =\) 3) \(\frac{7}{8} + \frac{3}{4} =\) 4) \(\frac{4}{7} + \frac{2}{21} =\) 5) \(\frac{9}{12} + \frac{3}{4} =\) 6) \(\frac{8}{9} + \frac{1}{3} =\) 7) \(\frac{4}{4} + \frac{7}{15} =\) 8) \(\frac{2}{21} + \frac{5}{14} =\) 9) \(\frac{3}{18} + \frac{5}{27} =\) 10) \(\frac{3}{15} + \frac{7}{20} =\)
Ответ:
Выполним сложение дробей.
- \(\frac{1}{1} + \frac{1}{12} = \frac{12}{12} + \frac{1}{12} = \frac{12+1}{12} = \frac{13}{12}\)
- \(\frac{1}{6} + \frac{1}{3} = \frac{1}{6} + \frac{1 \cdot 2}{3 \cdot 2} = \frac{1}{6} + \frac{2}{6} = \frac{1+2}{6} = \frac{3}{6} = \frac{1}{2}\)
- \(\frac{7}{8} + \frac{3}{4} = \frac{7}{8} + \frac{3 \cdot 2}{4 \cdot 2} = \frac{7}{8} + \frac{6}{8} = \frac{7+6}{8} = \frac{13}{8}\)
- \(\frac{4}{7} + \frac{2}{21} = \frac{4 \cdot 3}{7 \cdot 3} + \frac{2}{21} = \frac{12}{21} + \frac{2}{21} = \frac{12+2}{21} = \frac{14}{21} = \frac{2}{3}\)
- \(\frac{9}{12} + \frac{3}{4} = \frac{9}{12} + \frac{3 \cdot 3}{4 \cdot 3} = \frac{9}{12} + \frac{9}{12} = \frac{9+9}{12} = \frac{18}{12} = \frac{3}{2}\)
- \(\frac{8}{9} + \frac{1}{3} = \frac{8}{9} + \frac{1 \cdot 3}{3 \cdot 3} = \frac{8}{9} + \frac{3}{9} = \frac{8+3}{9} = \frac{11}{9}\)
- \(\frac{4}{4} + \frac{7}{15} = \frac{4 \cdot 15}{4 \cdot 15} + \frac{7}{15} = \frac{60}{15} + \frac{7}{15} = \frac{60+7}{15} = \frac{67}{15}\)
- \(\frac{2}{21} + \frac{5}{14} = \frac{2 \cdot 2}{21 \cdot 2} + \frac{5 \cdot 3}{14 \cdot 3} = \frac{4}{42} + \frac{15}{42} = \frac{4+15}{42} = \frac{19}{42}\)
- \(\frac{3}{18} + \frac{5}{27} = \frac{3 \cdot 3}{18 \cdot 3} + \frac{5 \cdot 2}{27 \cdot 2} = \frac{9}{54} + \frac{10}{54} = \frac{9+10}{54} = \frac{19}{54}\)
- \(\frac{3}{15} + \frac{7}{20} = \frac{3 \cdot 4}{15 \cdot 4} + \frac{7 \cdot 3}{20 \cdot 3} = \frac{12}{60} + \frac{21}{60} = \frac{12+21}{60} = \frac{33}{60} = \frac{11}{20}\)
Ответ: смотри решение выше
Похожие
- Выполните сложение Вариант 3 1) \(\frac{3}{8} + \frac{7}{16} =\) 2) \(\frac{5}{6} + \frac{11}{18} =\) 3) \(\frac{7}{11} + \frac{7}{33} =\) 4) \(\frac{3}{9} + \frac{5}{18} =\) 5) \(\frac{3}{5} + \frac{2}{15} =\) 6) \(\frac{8}{17} + \frac{1}{34} =\) 7) \(\frac{1}{4} + \frac{1}{6} =\) 8) \(\frac{5}{8} + \frac{1}{10} =\) 9) \(\frac{7}{9} + \frac{1}{6} =\) 10) \(\frac{2}{21} + \frac{3}{14} =\)
- Выполните сложение Вариант 4 1) \(\frac{1}{2} + \frac{3}{4} =\) 2) \(\frac{6}{7} + \frac{5}{14} =\) 3) \(\frac{2}{3} + \frac{7}{12} =\) 4) \(\frac{4}{5} + \frac{3}{20} =\) 5) \(\frac{4}{9} + \frac{7}{18} =\) 6) \(\frac{9}{10} + \frac{4}{15} =\) 7) \(\frac{5}{6} + \frac{3}{14} =\) 8) \(\frac{5}{12} + \frac{1}{18} =\) 9) \(\frac{1}{3} + \frac{3}{12} =\) 10) \(\frac{3}{4} + \frac{1}{6} =\)
- Выполните вычитание Вариант 2 1) \(\frac{7}{20} - \frac{11}{50} =\) 2) \(\frac{17}{33} - \frac{5}{22} =\) 3) \(\frac{9}{20} - \frac{5}{8} =\) 4) \(\frac{4}{7} - \frac{13}{28} =\) 5) \(\frac{5}{13} - \frac{14}{39} =\) 6) \(\frac{3}{8} - \frac{5}{12} =\) 7) \(\frac{3}{4} - \frac{5}{12} =\) 8) \(\frac{15}{23} - \frac{27}{46} =\) 9) \(\frac{9}{25} - \frac{14}{100} =\) 10) \(\frac{17}{35} - \frac{13}{28} =\)
- Выполните вычитание Вариант 3 1) \(\frac{2}{21} - \frac{1}{14} =\) 2) \(\frac{7}{9} - \frac{1}{6} =\) 3) \(\frac{5}{17} - \frac{11}{34} =\) 4) \(\frac{4}{5} - \frac{11}{15} =\) 5) \(\frac{3}{18} - \frac{4}{27} =\) 6) \(\frac{3}{8} - \frac{1}{12} =\) 7) \(\frac{11}{14} - \frac{1}{7} =\) 8) \(\frac{11}{63} - \frac{1}{9} =\) 9) \(\frac{12}{15} - \frac{2}{5} =\) 10) \(\frac{11}{27} - \frac{1}{9} =\)
- Выполните вычитание Вариант 4 1) \(\frac{4}{5} - \frac{6}{10} =\) 2) \(\frac{17}{4} - \frac{2}{51} =\) 3) \(\frac{5}{6} - \frac{4}{9} =\) 4) \(\frac{14}{15} - \frac{2}{3} =\) 5) \(\frac{4}{25} - \frac{6}{75} =\) 6) \(\frac{26}{45} - \frac{16}{30} =\) 7) \(\frac{13}{18} - \frac{5}{24} =\) 8) \(\frac{15}{27} - \frac{1}{9} =\) 9) \(\frac{13}{18} - \frac{5}{24} =\) 10) \(\frac{5}{13} - \frac{7}{26} =\)
