### Singapore Math

# Dimensions Math Teacher's Guide 4B

**Dimensions Math ^{®} Teacher's Guide 4B**

Chapter 10: Measurement

Teaching Notes

Chapter Opener

Lesson 1: Metric Units of Measurement

Lesson 2: Customary Units of Length

Lesson 3: Customary Units of Weight

Lesson 4: Customary Units of Capacity

Lesson 5: Units of Time

Lesson 6: Practice A

Lesson 7: Fractions of Measurement — Part 1

Lesson 8: Fractions of Measurement — Part 2

Lesson 9: Practice B

Workbook Solutions

Chapter 11: Area and Perimeter

Teaching Notes

Chapter Opener

Lesson 1: Area of Rectangles Part 1

Lesson 2: Area of Rectangles Part 2

Lesson 3: Area of Composite Figures

Lesson 4: Perimeter — Part 1

Lesson 5: Perimeter — Part 2

Lesson 6: Practice

Workbook Solutions

Chapter 12: Decimals

Teaching Notes

Chapter Opener

Lesson 1: Tenths — Part 1

Lesson 2: Tenths — Part 2

Lesson 3: Hundredths — Part 1

Lesson 4: Hundredths — Part 2

Lesson 5: Expressing Decimals as Fractions in Simplest Form

Lesson 6: Expressing Fractions as Decimals

Lesson 7: Practice A

Lesson 8: Comparing and Ordering Decimals

Lesson 9: Rounding Decimals

Lesson 10: Practice B

Workbook Solutions

Chapter 13: Addition and Subtraction of Decimals

Teaching Notes

Chapter Opener

Lesson 1: Adding and Subtracting Tenths

Lesson 2: Adding Tenths with Regrouping

Lesson 3: Subtracting Tenths with Regrouping

Lesson 4: Practice A

Lesson 5: Adding Hundredths

Lesson 6: Subtracting from 1 and 0.1

Lesson 7: Subtracting Hundredths

Lesson 8: Money, Decimals, and Fractions

Lesson 9: Practice B

Review 3

Workbook Solutions

Chapter 14: Multiplication and Division of Decimals

Teaching Notes

Chapter Opener

Lesson 1: Multiplying Tenths and Hundredths

Lesson 2: Multiplying Decimals by a Whole Number — Part 1

Lesson 3: Multiplying Decimals by a Whole Number — Part 2

Lesson 4: Practice A

Lesson 5: Dividing Tenths and Hundredths

Lesson 6: Dividing Decimals by a Whole Number — Part 1

Lesson 7: Dividing Decimals by a Whole Number — Part 2

Lesson 8: Dividing Decimals by a Whole Number — Part 3

Lesson 9: Practice B

Workbook Solutions

Chapter 15: Angles

Teaching Notes

Chapter Opener

Lesson 1: The Size of Angles

Lesson 2: Measuring Angles

Lesson 3: Drawing Angles

Lesson 4: Adding and Subtracting Angles

Lesson 5: Reflex Angles

Lesson 6: Practice

Workbook Solutions

Chapter 16: Lines and Shapes

Teaching Notes

Chapter Opener

Lesson 1: Perpendicular Lines

Lesson 2: Parallel Lines

Lesson 3: Drawing Perpendicular and Parallel Lines

Lesson 4: Quadrilaterals

Lesson 5: Lines of Symmetry

Lesson 6: Symmetrical Figures and Patterns

Lesson 7: Practice

Workbook Solutions

Chapter 17: Properties of Cuboids

Teaching Notes

Chapter Opener

Lesson 1: Cuboids

Lesson 2: Nets of Cuboids

Lesson 3: Faces and Edges of Cuboids

Lesson 4: Practice

Review 4

Review 5

Workbook Solutions

Click here to view samples of Dimensions Math^{®} Teacher's Guide 4B.

**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**9781947226395