This is a die with 12 sides, numbered from 0 to 9 with a comma and a minus sign.
Very useful for solving math exams.
Roll digits until you get a comma, then keep rolling digits until you hit the comma again, and that's your random number with a comma. Whenever you hit the minus sign the sign of your number is inverted.
1.826 w x
1.59 d x
0.719 w x
0.626 d x