5/2-(4/7+1/2 ) bằng TÍNH

2 câu trả lời

Đáp án+Giải thích các bước giải:

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

= $\dfrac{5}{2}$ - ( $\dfrac{8}{14}$ +$\dfrac{7}{14}$ )

= $\dfrac{5}{2}$ - $\dfrac{15}{14}$

= $\dfrac{35}{14}$ - $\dfrac{15}{14}$

= $\dfrac{20}{14}$

= $\dfrac{10}{7}$

 

`5/2 - ( 4/7 + 1/2 )`

`= 5/2 - 4/7 - 1/2`

`= ( 5/2 - 1/2 ) - 4/7`

`= 2 - 4/7`

`= 14/7 - 4/7`

`= { 14 - 4 }/7`

`= 10/7`