Question

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1 19/65 : 3 33/52 - 1,08 : 0,81

Answer 1

$1 dfrac{19}{65}div 3 dfrac{33}{52} - 1,08div 0,81 = -dfrac{44}{45}\\ 1); 1 dfrac{19}{65}div 3 dfrac{33}{52} = dfrac{84}{65}div dfrac{189}{52} = dfrac{84}{65}cdot dfrac{52}{189} = dfrac{4}{5}cdot dfrac{4}{9} = dfrac{16}{45} \\ 2) ; 1,08div 0,81 = 1 dfrac{8}{100}div dfrac{81}{100} = dfrac{108}{100}cdot dfrac{100}{81} = dfrac{4}{1}cdot dfrac{1}{3} = dfrac{4}{3} \\ 3) ; dfrac{16}{45} - dfrac{4}{3} = dfrac{16-60}{45} = dfrac{-44}{45} = -dfrac{44}{45}$