Find the value of each expression mentally.

For each problem:

• Write a multiplication equation with a symbol for the unknown to represent the situation.
• Find the number that makes the equation true. Show your reasoning.

1. There are 15 bottles of paint. Han placed 5 bottles of paint on each table. How many tables have paint on them?

   1. equation:
   2. solution:

2. Lin’s class has 6 tables. Each table has 2 bags of clay. How many bags of clay does the class have?

   1. equation:
   2. solution:

3. Han’s class has 60 markers. There are 10 markers in a pack. How many packs of markers does the class have?

   1. equation:
   2. solution:

Solve each problem. Explain or show your reasoning.

1. Clare has 16 socks. She puts them in piles of 2. How many piles can she make?
2. Diego has 8 piles of socks. Each pile has 2 socks. How many socks does Diego have?
3. Andre has 16 socks. He puts them in 8 groups that are the same size. How many socks are in each group?
4. A store has 9 boxes. Each box has 5 shirts. How many shirts are there?
5. There are 80 sweaters in piles on a shelf. Each pile has 8 sweaters. How many piles of sweaters are on the shelf?