Number Theory

• Numeration

  • Decimal Place Value Intro (Khan Academy)

  • Reading and Writing Whole Numbers (Kuta Software)

• Expanded Form

  • Decimals in Expanded Form (Khan Academy)

• Number Lines and Order

  • Decimals on the Number Line (Khan Academy)

  • Comparing Decimals (Khan Academy)

• Decimal Notation

  • Decimals in Written Form (Khan Academy)

  • Decimals in Different Forms (Khan Academy)

  • Using Decimals in a Shopping Context (Illustrative Mathematics)

  • Naming Decimal Places (Kuta Software)

• Addition and Subtraction

  • Adding Decimals (Khan Academy)

  • Subtracting Decimals (Khan Academy)

  • Adding and Subtracting Decimals - Word Problems (Khan Academy)

  • Adding and Subtracting Rational Numbers (Khan Academy)

  • Using Diagrams to Represent Addition and Subtraction (Illustrative Mathematics)

  • Adding and Subtracting Decimals with Few Non-Zero Digits (Illustrative Mathematics)

  • Adding and Subtracting Decimals with Many Non-Zero Digits (Illustrative Mathematics)

  • Subtracting Rational Numbers (Illustrative Mathematics)

  • Adding and Subtracting to Solve Problems (Illustrative Mathematics)

  • Adding and Subtracting Decimals (Kuta Software)

• Multiplication and Division

  • Multiplying Decimals (Khan Academy)

  • Multiplying Decimals and Whole Numbers (Khan Academy)

  • Multiplying Decimals Strategies (Khan Academy)

  • Dividing Whole Numbers (Khan Academy)

  • Dividing Decimals (Khan Academy)

  • Divide Whole Numbers to Get a Decimal (Khan Academy)

  • Divide Decimals by Whole Numbers (Khan Academy)

  • Divide Whole Numbers by Decimals (Khan Academy)

  • Decimal Points in Products (Illustrative Mathematics)

  • Methods for Multiplying Decimals (Illustrative Mathematics)

  • Using Diagrams to Represent Multiplication (Illustrative Mathematics)

  • Calculating Products of Decimals (Illustrative Mathematics)

  • Dividing Numbers the Result in Decimals (Illustrative Mathematics)

  • Dividing Decimals by Whole Numbers (Illustrative Mathematics)

  • Dividing Decimals by Decimals (Illustrative Mathematics)

  • Using Operations on Decimals to Solve Problems (Illustrative Mathematics)

  • Say It With Decimals (Illustrative Mathematics)

  • Multiply! (Illustrative Mathematics)

  • Multiplying Decimals (Kuta Software)

• Estimation and Rounding

  • Multi-Digit Multiplication Estimation (Khan Academy)

  • Multi-Digit Division Estimation (Khan Academy)

  • Estimate to Divide Decimals (Khan Academy)

  • Rounding Decimals (Khan Academy)

  • Rounding Numbers (Kuta Software)

• Exponential Notation

• Divisibility Rules

  • Divisibility Rules (Mathigon)

• Prime and Composite Numbers

  • Prime Numbers (Mathigon)

  • The Distribution of Primes (Mathigon)

• Factorization

  • Factors and Multiples (Mathigon)

  • Divisibility and Factors (Kuta Software)

  • Factors and Factorization (Kuta Software)

  • Factoring Monomials (Kuta Software)

• Greatest Common Factor

  • Factors and Multiples (Khan Academy)

  • Greatest Common Factors (Mathigon)

  • Common Factors (Illustrative Mathematics)

  • Using Common Multiples and Common Factors (Illustrative Mathematics)

  • Greatest Common Factor (Kuta Software)

• Least Common Multiple

  • Factors and Multiples (Khan Academy)

  • Lowest Common Multiples (Mathigon)

  • Common Multiples (Illustrative Mathematics)

  • Using Common Multiples and Common Factors (Illustrative Mathematics)

  • Least Common Multiple (Kuta Software)

• Order of Operations

  • Order of Operations (Khan Academy)

  • Order of Operations #1 (Kuta Software)

  • Order of Operations #2 (Kuta Software)

• Mean and Range