## Chapter 2: Add and Subtract Whole Numbers

**What are we learning in this chapter:**

4.NBT.3 - Use place value understanding to round multi-digit whole numbers to any place.

4.NBT.4 - Fluently add and subtract multi-digit whole numbers using the standard algorithm.

4.OA.3- Solve multistep word problems posed with whole numbers and having whole- number answers using the four operations, including problems in which remainders must be interpreted. Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding.

4.OA.5 - Generate a number or shape pattern that follows a given rule. Identify apparent features of the pattern that were not explicit in the rule itself. For example, given the rule “Add 3” and the starting number 1, generate terms in the resulting sequence and observe that the terms appear to alternate between odd and even numbers. Explain informally why the numbers will continue to alternate in this way.

- I can round to a given place value (1-5).
- I can estimate sums and differences of multi-digit numbers by rounding (2-4).

4.NBT.4 - Fluently add and subtract multi-digit whole numbers using the standard algorithm.

- I can add and subtract multi-digit whole numbers using the
- standard algorithm (2-5, 2-6).

4.OA.3- Solve multistep word problems posed with whole numbers and having whole- number answers using the four operations, including problems in which remainders must be interpreted. Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding.

- I can add multi-digit whole numbers (2-5.)
- I can subtract multi-digit whole numbers (2-6).
- I can solve addition and subtraction multi-step word problems(2-9).

4.OA.5 - Generate a number or shape pattern that follows a given rule. Identify apparent features of the pattern that were not explicit in the rule itself. For example, given the rule “Add 3” and the starting number 1, generate terms in the resulting sequence and observe that the terms appear to alternate between odd and even numbers. Explain informally why the numbers will continue to alternate in this way.

- I can generate a number pattern that follows a given rule (2-2).

**Lesson 1: Addition Properties and Subtraction Rules**

**Activities**

Practice Lesson One Vocabulary Quizlet

IXL Properties game

Studyjams Properties of Addition

Self-check Quiz

Animation from textbook explaining properties

Personal Tutor video: Commutative Property

Personal Tutor video: Identify Property

Facts Dash - Do mixed addition and subtraction,

Sums and Differences 0-20

**Lesson 2: Addition and Subtraction Patterns**

**Activities**

**Lesson 4: Estimate Sums and Differences**

**Activities**

**Video - estimating sums****Video - estimating differences****Robot Rounding****Robot Estimating sums and differences**

**Lesson 5: Add Whole Numbers**

Activities:

Video modeling adding whole numbers

**Lesson 8: Problem-Solving Investigation using Diagrams**