Question

2/5:40%+(0,35+3/10).5/9

làm cả phép tính

Answer 1

2/5:0,4+(0,35+3/10).5/9

=2/5:0,4+13/20.5/9

=1+13/36

=49/36

Answer 2

=\(\dfrac{2}{5}\):\(\dfrac{2}{5}\)+(\(\dfrac{7}{20}\)+\(\dfrac{3}{10}\)).\(\dfrac{5}{9}\)

= \(\dfrac{2}{5}\).\(\dfrac{5}{2}\)+    \(\dfrac{13}{20}\).    \(\dfrac{5}{9}\)

=  1     +    \(\dfrac{13}{36}\)

=       \(\dfrac{49}{36}\)