Question

68/31 - 5/14 + 25/31 - 25/24 + 1/4

Answer 1

`68/31 - 5/14 + 25/31 - 25/24 + 1/4`

`= (68/31 + 25/31) - (5/14 + 25/24 - 1/4)`

`= 93/31 - (60/168 + 175/168 - 42/168)`

`= 93/31 - 193/168`

`= 3  - 193/168`

`= 504/168 - 193/168`

`= 311/168`

Answer 2

Sửa đề:  \(\dfrac{68}{31}-\dfrac{5}{24}+\dfrac{25}{31}-\dfrac{25}{24}+\dfrac{1}{4}\)
\(=\left(\dfrac{68}{31}+\dfrac{25}{31}\right)-\left(\dfrac{5}{24}+\dfrac{25}{24}\right)+\dfrac{1}{4}\)
\(=\dfrac{93}{31}-\dfrac{30}{24}+\dfrac{1}{4}\)
\(=3-\dfrac{5}{4}+\dfrac{1}{4}\)
\(=3-\left(\dfrac{5}{4}-\dfrac{1}{4}\right)\)
\(=3-1\)
\(=2\)