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Area – Find the Missing Side Length – Digital Activities + Video Lesson


SKU: 5430623 Categories: ,


This resource includes a Video Lesson and Google Slides activity for Finding the Missing Side Length in Area problems. This resource is excellent for Distance Learning. Students will learn how to use long division to find the missing side length when the area and width of a rectangle are known.

This Simple and Easy-to-Use resource is designed for 4th grade students and aligns to these standards: TEKS 4.5D and CCSS 4.MD.A.3.

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This is Lesson 2 in the Perimeter and Area Series

⭐ Student Devices must have access to You-Tube to view the Video Lesson ⭐

The Video Lesson:

  • Uses related multiplication and division facts to teach that a missing side length is a missing factor multiplication problem that can be solved using division
  • Models using long division to solve problems
  • Walks students through the Google Slides activities they will complete
  • Is approximately 9 minutes

⭐ Many of the slides are self-checking, so students can work through the activity with confidence.

Topics and Activities Include:

  • Creating related facts using the Length, Width and Area of Rectangles
  • Long Division support with Self-Checking boxes half-way through and all the way through Long Division problems
  • Fun Google Slides Activities with movable pieces
  • Application of Learning in Real-World Word Problems
  • Word Problems have optional Step-by-Step support

What’s Included?

  • Video Lesson with Activity Instructions
  • 10 Interactive Activities
  • Teacher Key in separate Google Slides™ doc that can be assigned to students to check their work at home with their parents
  • PDF with a link to make a copy of the Google Slides™ in your Google Drive
  • Directions on how to assign the Google Slides™ activity to students in Google Classroom™

Standards Alignment

CCSS.4.MD.A.3 Apply the area and perimeter formulas for rectangles in real world and mathematical problems. For example, find the width of a rectangular room given the area of the flooring and the length, by viewing the area formula as a multiplication equation with an unknown factor.

TEKS 4.5D Solve problems related to perimeter and area of rectangles where dimensions are whole numbers.

Additional information

Resource Type

Digital Resources

Grade Level


Number of Pages

10 practice slides + Video + Answer key

Common Core