• Unit Overview

  • Letter Home
  • Unit Preparation
  • Mathematics in this Unit
  • Assessment in this Unit
  • Key Assessment Opportunities Chart
• Daily Practice and Problems
• Home Practice

• Lesson 1

  • Part 1: Revisiting the Subtraction Strategies Menu for the Facts
  • Part 2: Introduce the Triangle Flash Cards for Subtraction
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 2

  • Part 1: Develop Strategies for Subtraction Problems
  • Part 2: Emphasize Different Subtraction Strategies
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 3

  • Developing the Lesson
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 4

  • Part 1: Subtraction Problems with No Trades
  • Part 2: Subtraction Problems with Trades
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 5

  • Part 1: Connect Base-Ten Pieces to Expanded Form
  • Part 2: Check Subtraction with Addition
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 6

  • Part 1: Recording Subtraction on the Base-Ten Recording Sheet
  • Part 2: Checking for Reasonableness
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 7

  • Part 1: Making Connections Between Strategies
  • Part 2: Common Mistakes in Subtracting
  • Part 3: Introducing the Subtraction Strategies Menu
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 8

  • Before the Lesson
  • Part 1: Explore Subtraction Strategies
  • Part 2: Practicing Subtraction Strategies
  • Part 3: Difference War
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 9

  • Developing the Lesson
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

Lesson 7

Make Connections with Subtraction

Est. Class Sessions: 2

Daily Practice and Problems

X

Teacher Notes

X

Have desk number lines readily available.

14 degrees

Possible response: I skip counted on the number line from 41 to 51 then 4 more hops to 55; 10 + 4 = 14.

X. Temperatures

On Sunday it was 55 degrees outside. On Monday it was 41 degrees. How many degrees did the temperature fall from Sunday to Monday? Show or tell how you know.