Lesson 18
Using Common Multiples and Common Factors
Lesson Narrative
In this lesson, students apply what they have learned about factors and multiples to solve a variety of problems. In the first activity, students to use what they have learned about common factors and common multiples to solve less structured problems in context (MP1). The two activities that follow are optional. The optional activity "More Factors and Multiples" allows students to explore common factors and common multiples of 3 whole numbers and present their findings. The optional activity "Factors and Multiples Bingo" allows students to practice finding multiples and factors.
Learning Goals
Teacher Facing
- Choose to calculate the greatest common factor or least common multiple to solve a problem about a real-world situation, and justify (orally) the choice.
- Present (orally, in writing, and using other representations) the solution method for a problem involving greatest common factor or least common multiple.
Student Facing
Let’s use common factors and common multiple to solve problems.
Required Materials
Required Preparation
If using the optional activity, "More Factors and Multiples," provide access to tools for creating a visual display.
If using the optional "Factors and Multiples Bingo" activity, prepare one set of pre-printed slips, one set of pre-printed Bingo boards cut from the blackline master, and enough Bingo chips for the boards. Each group of 2 students will share 1 Bingo board. It is suggested that the Bingo boards are copied onto cardstock for durability.
Learning Targets
Student Facing
- I can solve problems using common factors and multiples.
CCSS Standards
Addressing
Print Formatted Materials
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| Student Task Statements | docx | |
| Cumulative Practice Problem Set | docx | |
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| Teacher Presentation Materials | docx | |
| Blackline Masters | zip |