Răspuns: - 16307/10360
Explicație pas cu pas:
[tex]\bf{(0.875 - 0.7) \div 5 \frac{2}{7} - 3 \times \frac{15}{28} =?}[/tex]
[tex]\bf{5 \frac{2}{7} = \frac{5 \times 7 + 2}{7} = \frac{35 + 2}{7} = \frac{37}{7} }[/tex]
[tex]\bf{(0.875 - 0.7) \div \frac{37}{7} - 3 \times \frac{15}{28 } = }[/tex]
[tex]\bf{0.175 \times \frac{7}{37} - \frac{45}{28} = \frac{7}{40} \times \frac{7}{37} - \frac{45}{28} = }[/tex]
[tex]\bf{ {}^{7)} \frac{49}{1480 } - {}^{370)} \frac{45}{28} = \frac{343}{10360} - \frac{16650}{10360} }[/tex]
[tex]\bf{ \frac{343 - 16650}{10360} = \frac{ - 16307}{10360} =\boxed{\bf{ - \frac{16307}{10360} }}}[/tex]
