Topic 6- Mental Addition

Lesson 6-1 Addition:  Adding Tens

Key Words: mental math, tens digit

Lesson 6-2 Addition: Adding Ones

Key Words: next ten

Lesson 6-3 Addition: Adding Tens and Ones

Lesson 6-4 Addition: Adding on a Hundred Chart

Lesson 6-5 Addition: Adding Multiples of 10

Lesson 6-6 Problem Solving: Look for a Pattern