Question

Please help me with number 42!!!

Answer 1

namely their difference, well, let's firstly convert the mixed fractions to improper fractions and then subtract the wingspan of the gull from the albatross'.

`\bf \stackrel{mixed}{3(3)/(5)}\implies \cfrac{3\cdot 5+3}{5}\implies \stackrel{improper}{\cfrac{18}{5}}~\hfill \stackrel{mixed}{1(7)/(10)}\implies \cfrac{1\cdot 10+7}{10}\implies \stackrel{improper}{\cfrac{17}{10}} \\\\[-0.35em] ~\dotfill\\\\ \stackrel{albatross}{\cfrac{18}{5}}-\stackrel{gull}{\cfrac{17}{10}}\implies \stackrel{\textit{using an LCD of 10}}{\cfrac{(2)18-(1)17}{10}}\implies \cfrac{36-17}{10}\implies \cfrac{19}{10}\implies 1(9)/(10)`