Question

A)5/23+7/17+0,25-5/23+10/17= TÍNH HỢP LÝ (TÍNH NHANH)

Answer 1

`5/23+7/17+0,25-5/23+10/17`

`=5/23+7/17+1/4-5/23+10/17`

`=(5/23-5/23)+(7/17+10/17)+1/4`

`= 0 + 1+1/4`

`= 1 +1/4`

`=4/4+1/4`

`=5/4`

Answer 2

\(\dfrac{5}{23}+\dfrac{7}{17}+0,25-\dfrac{5}{23}+\dfrac{10}{17}\\ =1+0,25=1,25\)

Answer 3

\(=\dfrac{5}{23}+\dfrac{7}{17}+\dfrac{1}{4}-\dfrac{5}{23}+\dfrac{10}{17}=\left(\dfrac{5}{23}-\dfrac{5}{23}\right)+\left(\dfrac{7}{17}+\dfrac{10}{17}\right)+\dfrac{1}{4}=1+\dfrac{1}{4}=\dfrac{5}{4}\)