Lesson 5.1

- Objective: Solve addition and subtraction problem situations using the strategy
*make a model.*

Lesson 5.2

- Objective: Record related facts within 20.
- Vocabulary:
**related facts**

Lesson 5.3

- Objective: Identify related addition and subtraction facts within 20.

Lesson 5.4

- Objective: Apply the inverse relationship of addition and subtraction.

Lesson 5.5

- Objective: Use related facts to determine unknown numbers.

Lesson 5.6

- Objective: Use related fact to subtract.

Lesson 5.7

- Objective: Choose an operation and strategy to solve an addition or subtraction word problem.

Lesson 5.8

- Objective: Represent equivalent forms of numbers using sums and differences within 20.

Lesson 5.9

- Objective: Determine if an equation is true or false.

- Objective: Add and subtract facts within 20 and demonstrate fluency for addition and subtraction within 10.