### Singapore Math

# Dimensions Math Teacher's Guide 3A

**Dimensions Math ^{®} Teacher's Guide 3A**Chapter 1: Numbers to 10,000

Teaching Notes

Chapter Opener

Lesson 1: Numbers to 10,000

Lesson 2: Place Value — Part 1

Lesson 3: Place Value — Part 2

Lesson 4: Comparing Numbers

Lesson 5: The Number Line

Lesson 6: Practice A

Lesson 7: Number Patterns

Lesson 8: Rounding to the Nearest Thousand

Lesson 9: Rounding to the Nearest Hundred

Lesson 10: Rounding to the Nearest Ten

Lesson 11: Practice B

Workbook Solutions

Chapter 2: Addition and Subtraction — Part 1

Teaching Notes

Chapter Opener

Lesson 1: Mental Addition — Part 1

Lesson 2: Mental Addition — Part 2

Lesson 3: Mental Subtraction — Part 1

Lesson 4: Mental Subtraction — Part 2

Lesson 5: Making 100 and Making 1,000

Lesson 6: Strategies for Numbers Close to Hundreds

Lesson 7: Practice A

Lesson 8: Sum and Difference

Lesson 9: Word Problems — Part 1

Lesson 10: Word Problems — Part 2

Lesson 11: 2-Step Word Problems

Lesson 12: Practice B

Workbook Solutions

Chapter 3: Addition and Subtraction — Part 2

Teaching Notes

Chapter Opener

Lesson 1: Addition with Regrouping

Lesson 2: Subtraction with Regrouping — Part 1

Lesson 3: Subtraction with Regrouping — Part 2

Lesson 4: Estimating Sums and Differences — Part 1

Lesson 5: Estimating Sums and Differences — Part 2

Lesson 6: Word Problems

Lesson 7: Practice

Workbook Solutions

Chapter 4: Multiplication and Division

Teaching Notes

Chapter Opener

Lesson 1: Looking Back at Multiplication

Lesson 2: Strategies for Finding the Product

Lesson 3: Looking Back at Division

Lesson 4: Multiplying and Dividing with 0 and 1

Lesson 5: Division with Remainders

Lesson 6: Odd and Even Numbers

Lesson 7: Word Problems — Part 1

Lesson 8: Word Problems — Part 2

Lesson 9: 2-Step Word Problems

Lesson 10: Practice **Review 1**

Workbook Solutions

Chapter 5: Multiplication

Teaching Notes

Chapter Opener

Lesson 1: Multiplying Ones, Tens, and Hundreds

Lesson 2: Multiplication Without Regrouping

Lesson 3: Multiplication with Regrouping Tens

Lesson 4: Multiplication with Regrouping Ones

Lesson 5: Multiplication with Regrouping Ones and Tens

Lesson 6: Practice A

Lesson 7: Multiply a 3-digit Number with Regrouping Once

Lesson 8: Multiplication with Regrouping More Than Once

Lesson 9: Practice B

Workbook Solutions

Chapter 6: Division

Teaching Notes

Chapter Opener

Lesson 1: Dividing Tens and Hundreds

Lesson 2: Dividing a 2-digit Number by 2 — Part 1

Lesson 3: Dividing a 2-digit Number by 2 — Part 2

Lesson 4: Dividing a 2-digit Number by 3, 4, and 5

Lesson 5: Practice A

Lesson 6: Dividing a 3-digit Number by 2

Lesson 7: Dividing a 3-digit Number by 3, 4, and 5

Lesson 8: Dividing a 3-digit Number, Quotient is 2 Digits

Lesson 9: Practice B

Workbook Solutions

Chapter 7: Graphs and Tables

Teaching Notes

Chapter Opener

Lesson 1: Picture Graphs and Bar Graphs

Lesson 2: Bar Graphs and Tables

Lesson 3: Practice**Review 2**

Workbook Solutions

Blackline Masters for 3A

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**Dimensions Math ^{®}**

**PreK-5 series**features the progression, rigor, and pacing that define Singapore math. Throughout the series, five characters offer students suggestions on how to think about problems. They remind students of strategies they’ve learned and point out important information that encourages them to come up with their own solutions.

Teacher’s Guides include lesson plans, mathematical background, games, helpful suggestions, and comprehensive resources for daily lessons. Lessons are laid out clearly and activities are designed for the whole class, small groups, and extension.

**Textbooks and Workbooks do not include answer keys. Answers are in Teacher's Guides.**

**ISBN**9781947226364