Please help ASAP!

isn't it 9/10

1 1/4 + (-3 1/6)=

Hello  mathbms!

$1\dfrac{1}{4}+(-3\dfrac{1}{6})=\dfrac{5}{4}-\dfrac{19}{6}=\dfrac{3\cdot 5-2\cdot 19}{12}=\color{blue}-\dfrac{23}{12}$

  !