Question

Решите плиз,срочно надо,оч быстро

Answer 1

$( frac{7}{12} + frac{4}{15} ) div frac{51}{60 } times frac{27}{34} = frac{27}{34}$

$1) frac{7}{12} + frac{4}{15} = frac{35}{60} + frac{16}{60} = frac{51}{60} \ = frac{17}{20}$

$1) frac{7}{12} + frac{4}{15} = frac{35}{60} + frac{16}{60} = frac{51}{60} \2) frac{51}{60} div frac{51}{60} = frac{51}{60} times frac{60}{51} = 1$

$3)1 times frac{27}{34} = frac{27}{34}$

$( frac{2}{5} - frac{1}{6} ) div frac{49}{60} = frac{2}{7}$

$1) frac{2}{5} - frac{1}{6} = frac{12}{30} - frac{5}{30} = frac{7}{30} \ 2) frac{7}{30} div frac{49}{60} = frac{7}{30} times frac{60}{49} = frac{2}{7}$