Question

5 2/5 + 4 3/7 - 1/4 + 44/77 - 2 2/5 - 0,75 làm như nào vậy

Answer 1

\(=5+\dfrac{2}{5}+4+\dfrac{3}{7}-\dfrac{1}{4}+\dfrac{4}{7}-2-\dfrac{2}{5}-\dfrac{3}{4}\)

\(=\left(5+4-2\right)+\left(\dfrac{2}{5}-\dfrac{2}{5}\right)+\left(\dfrac{3}{7}+\dfrac{4}{7}\right)-\dfrac{1}{4}-\dfrac{3}{4}\)

=7+1-1

=7

Answer 2

`#lv`

`5 2/5 + 4 3/7 - 1/4 + 44/77 - 2 2/5 - 0,75`

`= 27/5 + 31/7 - 4/7 - 12/5 - 3/4`

`= (27/5 - 12/5) + (31/7 - 4/7) + ( 1/4 + 3/4)`

`= 3 + 27/7 + 1`

`= 4 + 27/7`

`= 28/7 + 27/7`

`= 56/7`

`= 8`