8. Mrs. Rossi wrote the following clues for an unknown number.
It is a 4-digit number
•The tens are double the ones.
• The thousands are double the tens.
• The sum of the digits is 19.

What is the unknown number?

Axel follows these steps to divide 40 by 9: start with 40. 1. divide by 9 and write down the remainder. 2. write a zero after the remainder. 3. repeat steps 1 and 2 until you have a remainder of zero. examine his work, and then complete the statements below.