Question

Answer 1

3) \(=1.1+\dfrac{7}{9}:\dfrac{4}{9}-\dfrac{4}{5}\)
   \(=1+\dfrac{7}{4}-\dfrac{4}{5}\)
    \(=\dfrac{11}{4}-\dfrac{4}{5}=\dfrac{39}{20}\)
4) = 0,9 + 6 -2.0,8
    = 6,9 - 1,6 = 5.3

Answer 2

5 ) \(=0,6.\dfrac{5}{4}+\dfrac{1}{4}\)
     \(=\dfrac{3}{4}+\dfrac{1}{4}=1\)
6) \(=\dfrac{9}{4}-\left[\dfrac{1}{4}-9.\dfrac{1}{4}\right]\)
    \(=\dfrac{9}{4}-\left[\dfrac{1}{4}-\dfrac{9}{4}\right]=\dfrac{9}{4}-\left(-\dfrac{8}{4}\right)=\dfrac{17}{4}\)