Объяснение:
[tex]1) \frac{7}{13} + \frac{2}{5} = \frac{7 \times 5}{13 \times 5} + \frac{2 \times 13}{5 \times 13} = \frac{35}{65} + \frac{26}{65} = \frac{35 + 26}{65} = \frac{61}{65} [/tex]
[tex]2) \frac{61}{65} \times 1 \frac{4}{61} = \frac{61}{65} \times \frac{4 + 1 \times 61}{61} = \frac{61}{65} \times \frac{65}{61} = \frac{61 \times 65}{65 \times 61} = \frac{3965}{3965} = 1[/tex]
Ответ: 1
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Объяснение:
[tex]1) \frac{7}{13} + \frac{2}{5} = \frac{7 \times 5}{13 \times 5} + \frac{2 \times 13}{5 \times 13} = \frac{35}{65} + \frac{26}{65} = \frac{35 + 26}{65} = \frac{61}{65} [/tex]
[tex]2) \frac{61}{65} \times 1 \frac{4}{61} = \frac{61}{65} \times \frac{4 + 1 \times 61}{61} = \frac{61}{65} \times \frac{65}{61} = \frac{61 \times 65}{65 \times 61} = \frac{3965}{3965} = 1[/tex]
Ответ: 1