Question

Решите пж выражения !!!

Answer 1

16)
$frac{1}{ frac{1}{9} - frac{1}{12} } = frac{1}{ frac{4}{36} - frac{3}{12} } = frac{1}{ frac{1}{12} } = 12$
17)
$frac{1}{ frac{1}{5} - frac{1}{30} } = frac{1}{ frac{6}{30} - frac{1}{30} } = frac{1}{ frac{5}{30} } = frac{1}{ frac{1}{6} } = 6$
18)
$frac{1}{ frac{1}{3} - frac{1}{4} } = frac{1}{ frac{4}{12} - frac{3}{12} } = frac{1}{ frac{1}{12} } = 12$
19)
$frac{1}{ frac{1}{10} - frac{1}{15} } = frac{1}{ frac{3}{30} - frac{2}{30} } = frac{1}{ frac{1}{30} } = 30$