Lesson objective: Apply understanding of multiplicative comparisons in different types of problems.

This lesson provides an opportunity for students to apply their knowledge and understanding of comparisons to a real-life situation. Students are asked to figure out the cost of activities at a carnival and make a plan for how 1,500 points could be used.

Key Concept students will use:

- the meaning of multiplicative comparison does not change depending on the type of problem being solved or the units involved (in measurement problems)

Skills students will use:

- distinguishing between additive and multiplicative comparison
- modeling additive and multiplicative comparisons to find different unknowns
- using all four operations to create a plan for how points will be spent

Students engage in Mathematical Practice 1 (make sense of problems and persevere in solving them) as they analyze given information and use it to create a solution pathway to find unknowns.

**Key vocabulary: **

- additive comparison
- equation
- group size
- multiplicative comparison
- number of groups
- product
- tape diagram