Question

  Giải hộ

Answer 1

a) \(\dfrac{-4}{9}-\dfrac{2}{7}+\dfrac{-5}{9}\)

\(=\left(\dfrac{-4}{9}+\dfrac{-5}{9}\right)-\dfrac{2}{7}\)

\(=-1-\dfrac{2}{7}\)

\(=-\dfrac{9}{7}\)

b) \(\left(1,24-\dfrac{3}{5}\right)-\left(\dfrac{2}{5}+0,24\right)\)

\(=1,24-\dfrac{3}{5}-\dfrac{2}{5}-0,24\)

\(=\left(1,24-0,24\right)-\left(\dfrac{3}{5}+\dfrac{2}{5}\right)\)

\(=1-1\)

\(=0\)

Answer 2

a: =-4/9-5/9-2/7

=-1-2/7

=-9/7

b: =1,24-3/5-2/5-0,24-1

=1-1-1

=-1

Answer 3

a) -9/7

b) 0