Just go on a mental vacation. That's what I always did when my mum screamed or did other stuff. Try dividing by 7 and 9. It takes your mind off emotions and stuff, then you can just nod at her, and be on your way once she's done.
So sorry you have to go through that
Been there myself, but just remember that it won't last forever.
-------
Haikus are easy,
But sometimes they don't make sense,
Refrigerator.