Common Core Alignment

CCSS.Math.Content.2.OA.2 - Fluently add and subtract within 20 using mental strategies.2 By end of Grade 2, know from memory all sums of two one-digit numbers.

5: Math

Unit 2: Addition and Subtraction/Fact Power!
Lesson 2: So Many More Ways to Add
Lesson 3: Problem Solving with Addition
Lesson 6: Tricks to Build Fact Power
Lesson 7: Another Trick: Fact Families
Lesson 8: Adding and Subtracting to Solve Problems
Final Project: Mathematical Ocean Adventure