# 4. Apply scaling down to a real-world situation (A)

## About this lesson

Lesson objective: Apply understanding of multiplication of fractions less than one to solve real-world problems.

This lesson provides an opportunity for students to apply their knowledge and understanding of multiplying fractions and whole numbers a to real-life situation. Students are asked to create recommendations for scaling down the length of track and the total height and drop of a roller coaster to make it an appropriate size for younger kids.

Key Concept students will use:

- scaling does not always make numbers larger

Skills students will use:

- multiplication of whole numbers and fractions (Grade 4 Unit 11)

Students engage in Mathematical Practice 2 (reason abstractly and quantitatively) as they draw tape diagrams and write equations to interpret the situation of multiplying a number by a fraction less than one.

**Key vocabulary: **

- dimensions
- scaling
- tape diagram