Question

a) 5/3+ -7/12 + (-1/2)2

b) 1/7 × 3/9 + -13/9 ×1/7 ×4/9

Answer 1

a) \(\dfrac{5}{3}+\left(-\dfrac{7}{13}\right)+\left(-\dfrac{1}{2}\right)\cdot2\)

\(=\dfrac{5}{3}-\dfrac{7}{13}-1\)

\(=\dfrac{65}{39}-\dfrac{21}{39}-\dfrac{39}{39}\)

\(=\dfrac{5}{39}\)

b) \(\dfrac{1}{7}\cdot\dfrac{3}{9}+\left(-\dfrac{13}{9}\right)\cdot\dfrac{1}{7}\cdot\dfrac{4}{9}\)

\(=\dfrac{1}{21}-\dfrac{52}{567}=-\dfrac{25}{567}\)

Answer 2