Your device is currently offline. You can view downloaded files in My Downloads.

Lesson Plan

6. Practice finding unknown numbers in equations (FP)

teaches Common Core State Standards 1.3D
teaches Common Core State Standards 1.5F
teaches Common Core State Standards CCSS.Math.Content.1.OA.D.8
teaches Common Core State Standards CCSS.Math.Practice.MP4
teaches Common Core State Standards MAFS.1.OA.4.8
Quick assign

You have saved this lesson!

Here's where you can access your saved items.


Card of

or to view additional materials

You'll gain access to interventions, extensions, task implementation guides, and more for this lesson.

Lesson objective: Apply understandings of symbols within equations and the meaning of the equals sign to find unknown numbers and create true equations.

This lesson helps to build fluency with finding unknown numbers in equations. Two-sided counters are used here to give students a visual representation of the numbers given in each equation. This work develops students' ability to find unknown numbers. It also develops students' understanding that symbols can be used to represent unknown numbers in equations.

Students engage in Mathematical Practice #4 (model with mathematics) as they determine the meaning and value of symbols and use addition strategies to justify their reasoning.

Key vocabulary:

  • equation
  • missing
  • symbol
  • true
  • unknown

Special materials needed:

  • counters
  • cubes 
  • number cards
Related content

Appears in

Interpreting and using symbols in numeric expressions and comparisons

Provide feedback