# Lesson 12

Applications of Arithmetic with Powers of 10

### Lesson Narrative

Students apply what they have learned about working with exponents (especially powers of ten) to solve rich problems in context. The style of questioning requires students to identify essential features of the problem and persevere to calculate and interpret the solutions in context (MP1, MP2, MP4). Students must attend to precision when considering appropriate units of measurement (MP6).

### Learning Goals

Teacher Facing

• Determine what information is needed to answer a question about large numbers, and explain (orally) how that information would help solve the problem.
• Use exponent rules and powers of 10 to solve problems in context, and explain (orally) the steps used to organize thinking.

### Student Facing

Let's use powers of 10 to help us make calculations with large and small numbers.

### Student Facing

• I can apply what I learned about powers of 10 to answer questions about real-world situations.