Lesson objective: Estimate products and solve multiplication problems.

This lesson provides an opportunity for students to apply their knowledge and understanding of the standard algorithm to a real-life situation. Students are asked to calculate the amount of garbage produced yearly for a variety of people based on the yearly average of 1,508 pounds.

Key Concept students will use:

- The standard algorithm can be a efficient way to solve multiplication problems.
- Estimation and place value can be used to determine the reasonableness of products.

Skills students will use:

- estimating partial products
- estimating total products
- multiplying with the standard algorithm

Students engage in Mathematical Practice 8 (look for and express regularity in repeated reasoning) as they estimate products and use the standard algorithm for multiplication.

**Key vocabulary: **

- algorithm
- digit value
- distributive property
- estimation
- multiplication
- partial product
- place value
- product
- standard algorithm