Lesson 2.4 - Adding and Subtracting Decimals

Lesson 2.4 - Goals and Objectives:

• Students will use models to add and subtract decimals.

• Students will add and subtract decimals.

Resource #2 - Class Notes Answer Key - Video Explanation:

• For a video explanation of this lesson's class notes, please click here to access the video.

Resource #3 - Big Ideas Math - Daily Practice Exercises - Video Explanations:

• For a video explanation of this lesson's Basic/Average Exercises, please click here to access the video.

• For a video explanation of this lesson's Challenge Exercises, please click here to access the video.

Resource #4 - Mr. Donahue Support Videos and Explanations - Specific Problems and/or Concepts:

• For a video explanation of The Process for Adding or Subtracting Decimals (Key Vocabulary/Idea), please click here to access the video.

• For a video explanation of Adding Decimals (Orange Dot #1), please click here to access the video.

• For a video explanation of Subtracting Decimals (Orange Dot #2), please click here to access the video.

Resource #5 - Additional Materials to Print and Practice with Answer Keys:

• Record and Practice Journal - These exercises are written to match the kind of material in the textbook that directly practices skills and problem solving, or that directly applies the standards of the lesson. Exercises occur in the same order in which topics are taught in the textbook, beginning with skill and ending with problem solving.

• Practice A - These exercises provide more additional practice on the key concepts taught in the lesson with more emphasis put on the problem solving portion of the individual lesson. Exercises occur in the same order in which topics are taught in the textbook, beginning with skill and ending with problem solving.

• Puzzle Time - These exercises provide additional practice in a fun format in which students use their mathematical knowledge to solve a riddle. This format allows students to self-check their work.

• Answer Keys - These PDFs show just the answers, not the solutions, but offer the opportunity to see at least if the completed work is correct or not.

Resource #6 - Big Ideas Math Support Videos and Tutorials:

These are one-to-three minutes in length and provide video and audio support for each and every example covered in the class textbook as well as our class notes. Often, these videos complete the same example as we do, just using different numbers so conceptual carry-over can occur. These are valuable for students who miss a class, need a second explanation, or assistance with Daily Practice Exercises.

Click on the link to access these support videos from BIM.

• Support Video #1 - Supports Understandings in Orange Dot #1 - Adding Decimals

• Support Video #2 - Supports Understandings in Orange Dot #2 - Subtracting Decimals

• Support Video #3 - Supports Understandings in Orange Dot #3 - Real-Life Application

• Support Video #4 - Supports Understandings in Orange Dot #4 - Real-Life Application