Question

Dau coroana celui care a răspuns corect

Answer 1

$11 \frac{47}{75} - 7 \frac{9}{25} = \\ \\ \frac{11 \times 75 + 47}{75} - 7 \frac{9}{25} = \\ \\ \frac{825 + 47}{75} - 7 \frac{9}{25} = \\ \\ \frac{872}{75} - 7 \frac{9}{25} = \\ \\ \frac{872}{75} - \frac{7 \times 25 + 9}{25} = \\ \\ \frac{872}{75} - \frac{175 + 9}{25} = \\ \\ \frac{872}{75} - \frac{184}{25} = \\ \\ \frac{872}{75} - \frac{184 \times 3}{25 \times 3} = \\ \\ \frac{872}{75} - \frac{552}{75} = \\ \\ \frac{872 - 552}{75} = \frac{320}{75} = \frac{64}{15} = 4 \frac{4}{15}$