Unit 6: Addition and Subtraction Facts Through 12

• Chapter 15: Addition Facts Through 12
  • Lesson 15.1 Count On to Add
  • Lesson 15.2 Sums of 10
  • Lesson 15.3 Making 10 to Add
  • Lesson 15.4 Order Property
  • Lesson 15.5 Addition Facts Practice
  • Lesson 15.6 Add Three Numbers
  • Lesson 15.7 Missing Addends
  • Lesson 15.8 Problem-Solving: Make a Table
• Chapter 16: Subtraction Facts Through 12
  • Lesson 16.1 Count Back to Subtract
  • Lesson 16.2 Parts and Wholes
  • Lesson 16.3 Relate Addition and Subtraction
  • Lesson 16.4 Subtraction Facts Practice
  • Lesson 16.5 Fact Families for 11
  • Lesson 16.6 Fact Families for 12
  • Lesson 16.7 Names for Numbers
  • Lesson 16.8 Problem-Solving: Choose the Operation