Lesson objective: Solve word problems that compare fractions and decimals.

This lesson provides an opportunity for students to apply their knowledge and understanding of comparing decimals and fractions to a real-world situation. Students are asked to compare the distance that watermelon seeds were spit in meters to see what were possible distances for the person who came in second place.

Key Concept students will use:

- We can use place value understanding to compare decimals that refer to the same whole.

Skills students will use:

- Understanding equivalent fractions (Grade 3, Unit 10)
- Comparing Fractions (Grade 3, Unit 11)
- Understanding fraction equivalence and comparison (Grade 4, Unit 5)

Students engage in Mathematical Practice 7 (Look for and make use of structure) as they use organizers to work through a task. Then using that organization they should be able to answer questions and look to find patterns and repeated reasoning that can help solve problems.

**Key vocabulary: **

- decimal
- denominator
- equivalent
- flat
- greater than
- less than
- model
- number line
- numerator
- representation
- rod
- unit
- hundredth
- tenth

**Special materials needed:**

- base 10 manipulative
- paper copies of flats
- paper copies of rods
- tiles