Find the value of each expression mentally.

1. Complete the table with the value of the 8 in each number. 

   number	value of the 8
   180,000
   108,000
   100,800
   100,080
   100,008

2. Describe the relationship between the value of the 8 in each number.

3. Write a multiplication or division equation to represent the relationship between the values of the 8 in two different numbers in the table.

Diego’s class counts collections of play money during a math class. There are 4 types of bills: tens, hundreds, thousands, and ten thousands.

Diego finds 9 of each type of bill. He organizes each type into a stack, creating 4 stacks.

1. How much money is in each stack of bills?

   1. 9 tens

   2. 9 hundreds

   3. 9 thousands

   4. 9 ten thousands

2. Describe the relationship between the values of each stack of bills.

3. How is the value of the stack of thousands related to the value of the stack of ten thousands? Write an equation for this relationship.

4. Clare had 21 bills of each type. How much money is in each stack of bills Clare has?

   1. 21 tens

   2. 21 hundreds

   3. 21 thousands

   4. 21 ten thousands

5. What is the value of the 2 in each stack of bills?
6. How is the value of the 2 in the stack of thousands related to the value of 2 in the stack of ten thousands? Write an equation for this relationship.