Round up

Ned was obsessive with round numbers. He hated anything that didn’t end in a zero.
So, his wife Molly set up ten savings accounts.
Each earned a pittance in interest, but the balances weren’t round. That drove Ned bonkers.
So, he added money to each until they had nice round numbers again.
Every month, the interest messed up the balances, and Ned kept adding more.
For years, he did this, until the day he died.
Ned’s funeral ate up all of the savings.
Which left Molly with the life insurance.
She ran off with a young stud.
Who hated math.