Math Basics > Unit 1 Number Sense

Welcome to Unit 1!

In this unit, you will learn how to:

• Identify the different types of numbers in the real number system
• Recognize and apply the commutative, associative, identity, and inverse properties
• Add, subtract, multiply, and divide positive and negative integers
• Solve problems by rounding and estimating
• Identify factors of a number using prime factorization and divisibility rules
• Find the greatest common factor and least common multiple of a pair of numbers
• Distinguish between the factors and multiples of a number

Lessons

• 1.1 Types of Numbers
• 1.2 Commutative and Associative Properties
• 1.3 Identity and Inverse Properties
• 1.4 Adding Integers
• 1.5 Subtracting Integers
• 1.6 Multiplying and Dividing Integers
• 1.7 Rounding Whole Numbers
• 1.8 Rounding Decimals
• 1.9 Estimation Word Problems
• 1.10 Factors of a Number
• 1.11 Divisibility Rules
• 1.12 Prime Factorization
• 1.13 Greatest Common Factor
• 1.14 Least Common Multiple
• 1.15 Factors vs Multiples