# Singapore Math - Dimensions Math Textbook 1A

**Dimensions Math ^{®} Textbook 1A**Chapter 1: Numbers to 10

Lesson 1: Numbers to 10

Lesson 2: The Number 0

Lesson 3: Order Numbers

Lesson 4: Compare Numbers

Lesson 5: Practice

Chapter 2: Number Bonds

Lesson 1: Make 6

Lesson 2: Make 7

Lesson 3: Make 8

Lesson 4: Make 9

Lesson 5: Make 10 — Part 1

Lesson 6: Make 10 — Part 2

Lesson 7: Practice

Chapter 3: Addition

Lesson 1: Addition as Putting Together

Lesson 2: Addition as Adding More

Lesson 3: Addition with 0

Lesson 4: Addition with Number Bonds

Lesson 5: Addition by Counting On

Lesson 6: Make Addition Stories

Lesson 7: Addition Facts

Lesson 8: Practice

Chapter 4: Subtraction

Lesson 1: Subtraction as Taking Away

Lesson 2: Subtraction as Taking Apart

Lesson 3: Subtraction by Counting Back

Lesson 4: Subtraction with 0

Lesson 5: Make Subtraction Stories

Lesson 6: Subtraction with Number Bonds

Lesson 7: Addition and Subtraction

Lesson 8: Make Addition and Subtraction Story Problems

Lesson 9: Subtraction Facts

Lesson 10: Practice**Review 1**

Chapter 5: Numbers to 20

Lesson 1: Numbers to 20

Lesson 2: Add or Subtract Tens or Ones

Lesson 3: Order Numbers to 20

Lesson 4: Compare Numbers to 20

Lesson 5: Addition

Lesson 6: Subtraction

Lesson 7: Practice

Chapter 6: Addition to 20

Lesson 1: Add by Making 10 — Part 1

Lesson 2: Add by Making 10 — Part 2

Lesson 3: Add by Making 10 — Part 3

Lesson 4: Addition Facts to 20

Lesson 5: Practice

Chapter 7: Subtraction Within 20

Lesson 1: Subtract from 10 — Part 1

Lesson 2: Subtract from 10 — Part 2

Lesson 3: Subtract the Ones First

Lesson 4: Word Problems

Lesson 5: Subtraction Facts Within 20

Lesson 6: Practice

Chapter 8: Shapes

Lesson 1: Solid and Flat Shapes

Lesson 2: Grouping Shapes

Lesson 3: Making Shapes

Lesson 4: Practice

Chapter 9: Ordinal Numbers

Lesson 1: Naming Positions

Lesson 2: Word Problems

Lesson 3: Practice**Review 2**

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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.