Numbers and Number Operations107

• LESSON 1

• The TIMS Candy Company108

  Base-Ten Shorthand

  The Fewest Pieces Rule

  Homework

• LESSON 2

• Big Base-Ten Hoppers116

  Number Sentences

• LESSON 3

• Number Sentences123

  Unknowns

  Homework

• LESSON 4

• Addition128

  Using Base-Ten Pieces to Estimate

  Homework

• LESSON 5

• Subtraction137

  Homework

• LESSON 6

• Adding and Subtracting in Space146

  Rounding and Estimating

  When Do We Estimate?

  Solving Problems with Sums and Differences

  Homework

• LESSON 7

• Workshop: Addition and Subtraction152

  Digits Game

• LESSON 8

• Multiplication at the Zoo154

  Homework

• LESSON 9

• Paper-and-Pencil Multiplication158

  Multiplying with the All-Partials Method

  Multiplying with the Compact Method

  Homework

• LESSON 10

• Multiplication Strategies161