• 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: Base-Ten Review with Number Sentences
  • Part 2: Base-Ten Shorthand Review
  • Part 3: Fewest Pieces Rule
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 2

  • Part 1: Big Base-Ten Hoppers
  • Part 2: Helping Professor Peabody
  • 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: Sharing Addition Strategies
  • Part 2: Adding with Base-Ten Pieces and Paper-and-Pencil Methods
  • Part 3: Choosing Appropriate Strategies
  • Part 4: Using Base-Ten Pieces to Estimate
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 5

  • Part 1: Mental Math Strategies for Subtraction
  • Part 2: Subtracting with Base-Ten Pieces
  • Part 3: Subtracting with the Traditional Algorithm
  • Part 4: Checking with Addition
  • Part 5: Showing Work with Expanded Form
  • Part 6: Using Mental Math to Subtract
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 6

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

• Lesson 7

  • Before the Lesson
  • Part 1: Digits Game
  • Part 2: Workshop
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 8

  • Before the Lesson
  • Part 1: Exploring Strategies for Solving Multiplication Problems
  • Part 2: Using Rectangles and Expanded Form to Multiply
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 9

  • Part 1: The All-Partials Method
  • Part 2: The Compact Method
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

• Lesson 10

  • Part 1: Building a Multiplication Strategies Menu
  • Part 2: Multiplication Problems
  • Summarizing the Lesson
  • Homework and Practice
  • Answer Keys

Lesson 4

Addition

Est. Class Sessions: 2–3

Daily Practice and Problems

X

Teacher Notes

X

TIMS Bit

To begin the game, students draw a playing board on their papers as shown. The teacher chooses a digit at random from a set of Digit Cards 0–9. Make digit cards from the Digit Cards Master, index cards, or a deck of playing cards. The ace can stand for 1 and the joker or a face card can stand for zero. Students write the digit in a box on the playing board in such a way as to try to get the largest sum. Once a digit is placed, it can't be moved. Then, the teacher chooses a second digit without replacing the first. Play continues until the teacher has read enough digits to fill the boxes on the playing boards. The players with the largest sum win.

Play again. This time students try to find the smallest sum.

M. Play Digits Game

Play Digits Game for addition. Draw a playing board like this on your paper. As your teacher or classmate chooses the digits, write them in the boxes. Try to find the largest sum. Remember that each digit will be used only once.

Play the game again. This time try to find the smallest sum.