Oy vey. Matilda is having a hard time, because she wishes her parents weren't so awful.
The only thing that keeps her going is her plot of playing revenge pranks. While the parrot-ghost bought her a week of relative peace, it can't last forever.
Soon enough, trouble strikes again.
One night, the family is waiting to have dinner. Mr. Wormwood had what he thinks is a great day at work, because he sold five cars.
He makes up a story problem for Mike based on what he bought each car for and resold it at. (Side note: can you imagine if Mr. Wormwood were your math teacher? Yuck.)
Mike tells their dad he's great and smart, and Mr. Wormwood boasts about one of his special marketing tools.
Even so, the math is way too complicated for Mike, who writes all the numbers down and can't do the total in his head.
When he starts adding it up, Matilda jumps in with the answer.
Obviously, she did it immediately, in her head.
Mr. Wormwood just tries to ignore her, but Matilda sticks up for herself and asks him to double-check it.
Oh no. Her dad's horrified to discover that Matilda was right, and promptly accuses her of being "a cheat and a liar." He says that Matilda must have sneaked over to see the answer, which he'd written down, but she tells him that it wasn't physically possible.
Then, Mrs. Wormwood interrupts everyone, coming in with their food.
At dinner, Mr. Wormwood makes them watch TV, and won't let Matilda defend herself against the idea that she's a cheater.