The World Almanac® for Kids Elementary now has two new mathematics topic areas to help elementary-level students improve their subtraction and multiplication skills. Both Math: Subtraction and Math: Multiplication include full four-color images and diagrams and are supplemented with Fun Facts articles (such as “A Symbol Secret”), editorially selected videos, and games and puzzles that reinforce lesson concepts.

Sections of the new Math: Subtraction topic area include:

• Understanding Subtraction, covering “What Is Subtraction?”, “Why Subtraction Is Important,” and “Subtraction Terms, Symbols, and More”
• Subtracting within 20, including “Models for Subtracting within 20,” “Strategies for Subtracting within 20,” and “Fact Families”
• Subtracting within 100, covering “Models for Subtracting within 100,” “Strategies for Subtracting within 100,” and “Subtraction Algorithms”
• Subtracting Larger Numbers, including “Models for Subtracting Larger Numbers,” “Strategies for Subtracting Larger Numbers,” and “Subtraction Algorithms”
• More About Subtraction, covering “Identity Property of Subtraction” and “Checking Subtraction with Addition”

Sections of the new Math: Multiplication topic area include:

• Understanding Multiplication, covering “What Is Multiplication?”, “Why Multiplication Is Important,” and “Multiplication Terms and Symbols”
• Multiplying Single-Digit Factors, including “Models for Multiplying Single-Digit Factors,” “Strategies for Multiplying Single-Digit Factors,” and “Basic Multiplication Facts”
• Multiplying a Two-Digit Factor, covering “Models for Multiplying a Two-Digit Factor,” “Strategies for Multiplying a Two-Digit Factor,” and “Multiplication Algorithms”
• Multiplying Large Numbers, including “Models for Multiplying Large Numbers,” “Strategies for Multiplying Large Numbers,” and “Multiplication Algorithms”
• Properties of Multiplication, covering “Zero Property of Multiplication,” “Identity Property of Multiplication,” “Commutative Property of Multiplication,” “Associative Property of Multiplication,” and “Distributive Property of Multiplication”

Math: Subtraction and Math: Multiplication joins four other topic centers on math topics you can find in The World Almanac® for Kids Elementary, including Math: Addition, Math: Geometry, Math: Measurement, and Math: Time and Money.

Click on the links below for more information about The World Almanac® for Kids Elementary:

• For schools
• For public libraries