## Chapter 3

### Add and Subtract Decimals

### Lesson Resources and Help

## Videos - Math on the Spot

**NOTE: The following videos will only work if you are logged in to the Go Math! site. Instructions to log in to the Go Math! site can be found on the Math page toward the bottom.**

**Lesson 1 - **Thousandths

**Essential Idea:** Describe the relationship between two decimal place-value positions.

**Watch the Video Here:** Math on the Spot- Lesson 3.1

**Lesson 2 - **Place Value of Decimals

**Essential Idea: **How do you read, write, and represent decimals through the thousandths?

**Watch the Video Here: **Math on the Spot- Lesson 3.2

**Lesson 3 - **Place Value of Decimals

**Essential Idea:** How do you use place value to compare and order decimals?

**Watch the Video Here: **Math on the Spot- Lesson 3.3

**Lesson 4 - **Round Decimals

**Essential Idea:** How can you use place value to round decimals to a given place?

**Watch the Video Here: **Math on the Spot- Lesson 3.4

**Lesson 5 - **Decimal Addition

**Essential Idea:** How can you use base-ten blocks to model decimal addition?

**Watch the Video Here: **Math on the Spot- Lesson 3.5

**Lesson 6 - **Decimal Subtraction

**Essential Idea:** How can you use base-ten blocks to model decimal subtraction?

**Watch the Video Here: **Math on the Spot- Lesson 3.6

**Lesson 7 - **Estimate Decimal Sums & Differences

**Essential Idea:** How can you estimate decimal sums and differences?

**Watch the Video Here: **Math on the Spot- Lesson 3.7

**Lesson 8 - **Add Decimals

**Essential Idea:** How can you add decimals using the standard algorithm?

**Watch the Video Here: **Math on the Spot- Lesson 3.8

**Lesson 9 - **Subtract Decimals

**Essential Idea:** How can you subtract decimals using the standard algorithm?

**Watch the Video Here: **Math on the Spot- Lesson 3.9

**Lesson 10 - **Patterns with Decimals

**Essential Idea:** How can you use addition or subtraction to describe a pattern or create a sequence with decimals?

**Watch the Video Here: **Math on the Spot- Lesson 3.10

**Lesson 11 - **Add & Subtract Money

**Essential Idea:** How can the strategy "make a table" help you organize and keep track of your bank account balance?

**Watch the Video Here: **Math on the Spot- Lesson 3.11

**Lesson 12 - **Choose a Method

**Essential Idea:** Which method could you choose to find decimal sums and differences?

**Watch the Video Here: **Math on the Spot- Lesson 3.12