Question

Answer 1

bạn chụp rõ hơn đc ko 

nhìn này mù sớm

Answer 2

:))

Answer 3

\(a\))\(\dfrac{1}{6}-\dfrac{-5}{6}=\dfrac{-6}{6}=-1\)
\(b\))\(\dfrac{6}{13}-\dfrac{-14}{39}=\dfrac{18--14}{39}=\dfrac{32}{39}\)

Answer 4

`1/6 + (-5/6)=`\(\dfrac{1+\left(-5\right)}{6}\)`=-4/6`

`6/13 + (-14/39)=`\(\dfrac{6\times3}{13\times3}\) `+ (-14/39)=18/39 + (-14/39)=4/39`