Question

Answer 1

2: \(=\dfrac{1}{13}-\dfrac{5}{18}-\dfrac{1}{13}+\dfrac{12}{17}-\dfrac{12}{17}+\dfrac{5}{18}-\dfrac{7}{5}\)

=1/13-1/13+12/17-12/17+5/18-5/18-7/5

=-7/5

3: \(=\dfrac{15}{14}-\dfrac{17}{23}+\dfrac{80}{27}-\dfrac{5}{4}+\dfrac{17}{23}-\dfrac{15}{14}+\dfrac{1}{3}\)

=-1+80/27

=53/27

4: \(=\dfrac{1}{25}-\dfrac{4}{27}-\dfrac{23}{27}-\dfrac{1}{25}-\dfrac{5}{43}+\dfrac{5}{43}-\dfrac{4}{7}\)

=-1-4/7

=-11/7