Question

3 x ( 1/7 + 1/3 - 3/14 ) : 11/14

( 8/5 + 11/5 ) x 11/10 + ( 17/10 - 4/5) : 3/7

Answer 1

a: \(=3\cdot\dfrac{6+14-9}{42}\cdot\dfrac{14}{11}\)

\(=3\cdot\dfrac{11}{42}\cdot\dfrac{14}{11}=1\)

b: \(=\dfrac{19}{5}\cdot\dfrac{11}{10}+\dfrac{9}{5}\cdot\dfrac{7}{3}\)

\(=\dfrac{209}{50}+\dfrac{63}{15}=4.18+4.2=8,38\)