-5/-15 + 9/7 + 1/-3 - (-276/14)

2 câu trả lời

`\frac{-5}{-15}+\frac{9}{7}+\frac{1}{-3}-(-\frac{276}{14})`

 `=\frac{1}{3}+\frac{9}{7}-\frac{1}{3}+\frac{276}{14}`

`=(\frac{1}{3}-\frac{1}{3})+(\frac{9}{7}+\frac{276}{14})`

`=\frac{18}{14}+\frac{276}{14}`

`=\frac{294}{14}`

`=21`

`(-5)/(-15)+9/7+1/(-3)-(-276/14)`

`=1/3+ 9/7+ (-1)/3 + 138/7`

`=(1/3+(-1)/3)+(9/7+138/7)`

`= 0 + 21`

`=21`