Lesson objective: Multiply one-digit numbers by multiples of 10.

This lesson helps to build fluency with multiplication of one-digit numbers by multiples of 10. Coins rolled and placed in wrappers are used here because it supports putting objects in sets of multiples of 10. This work develops students' understanding that we can use our understanding of place value to multiply multiples of 10.

Students engage in Mathematical Practice 7 (Look for and make use of structure) as they find patterns and strategies for multiplying by 40 and 50 coins. Stacks and rolls of coins will be the primary visual representation. Strategies will include skip counting and muliplication fact fluency.

**Key vocabulary:**

- factor
- multiple
- product