Question

\(\dfrac{66}{210}\)- \(\dfrac{245}{210}\)= ...............

Answer 1

\(=\dfrac{-179}{210}\)

Answer 2

\(\dfrac{66}{210}-\dfrac{245}{210}=\dfrac{66-245}{210}=\dfrac{-179}{210}\)

Answer 3

chưa học âm mà 

Answer 4

= - 179/210