• 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 9

Snack Shop Addition and Subtraction

Est. Class Sessions: 1–2

Daily Practice and Problems

X

Teacher Notes

X

1. 231 minutes
2. 270 minutes
3. 41 more minutes
4. 21 fewer minutes
5. 95 min., 113 min., 136 min., 157 min.

FF. Reading Minutes

Tara’s class is tracking how many minutes they read each week for one month.

1. How many minutes were read in the first and second weeks?
2. How many minutes were read in the third and fourth weeks?
3. How many more minutes were read in the first week than in the second week?
4. How many fewer minutes were read in the first week than in the fourth week?
5. Put the minutes read in order from least to most.