Question

Умаляю поманите матиматика 6 класс

Answer 1

Ответ:

$1) \frac{7}{15} \div ( \frac{6}{10} - \frac{8}{3} ) + 19 \times \frac{2}{31} = \frac{7}{15} \div \frac{9 - 40}{15} + \frac{38}{31} = - \frac{7 \times 15}{15 \times 31} + 1 \frac{7}{31} = - \frac{7}{31} + 1 \frac{7}{31} = 1$

$2)(1 \frac{1}{35} \div \frac{4}{5} - 1 \frac{8}{35} ) \times 3 \frac{1}{3} = ( \frac{36 \times 5}{35 \times 4} - \frac{43}{35} ) \times \frac{10}{3} = \frac{45 - 43}{35} \times \frac{10}{3} = \frac{2 \times 10}{35 \times 3} = \frac{4}{21}$

$3)2 \frac{7}{9} \times \frac{18}{25} + \frac{9}{60} \div ( \frac{7}{12} - \frac{3}{5} ) = \frac{25 \times 18}{9 \times 25} + \frac{9}{60} \div \frac{35 - 36}{60} = 2 - \frac{9 \times 60}{60 \times 1} = 2 - 9 = - 7$