Вопрос:
Д/з по теме «Сложение и вычитание обыкновенных дробей».
Ответ:
- $$8\frac{1}{25}-7\frac{4}{5} = 8\frac{1}{25}-7\frac{20}{25} = 7\frac{26}{25}-7\frac{20}{25} = \frac{6}{25}$$
- $$4\frac{2}{81}-3\frac{2}{27} = 4\frac{2}{81}-3\frac{6}{81} = 3\frac{83}{81}-3\frac{6}{81} = \frac{77}{81}$$
- $$7\frac{2}{15}+4\frac{3}{16} = 7\frac{32}{240}+4\frac{45}{240} = 11\frac{77}{240}$$
- $$12\frac{3}{20}+7\frac{11}{13} = 12\frac{39}{260}+7\frac{220}{260} = 19\frac{259}{260}$$
- $$7-3\frac{4}{9} = 6\frac{9}{9}-3\frac{4}{9} = 3\frac{5}{9}$$
- $$8-\frac{5}{13} = 7\frac{13}{13}-\frac{5}{13} = 7\frac{8}{13}$$
- $$16\frac{3}{5}+17\frac{7}{10} = 16\frac{6}{10}+17\frac{7}{10} = 33\frac{13}{10} = 34\frac{3}{10}$$
- $$6\frac{1}{36}-5\frac{3}{16} = 6\frac{4}{144}-5\frac{27}{144} = 5\frac{148}{144}-5\frac{27}{144} = \frac{121}{144}$$
- $$12\frac{3}{4}-6\frac{7}{8}+4\frac{1}{2}-1\frac{2}{3} = 12\frac{18}{24}-6\frac{21}{24}+4\frac{12}{24}-1\frac{16}{24} = 16\frac{30}{24}-7\frac{37}{24} = 8\frac{54}{24}-7\frac{37}{24} = 8\frac{9}{4}-7\frac{37}{24} = 1\frac{17}{24}$$
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