# Basic Math

Topics in basic math and elementary school mathematics which include fractions, decimals, percents, integers, ratio and proportion.

Greatest Common Divisor/Greatest Common Factor

Lesson 1: Understanding Common Divisors
Lesson 2: Common Divisors and Greatest Common Divisor
Lesson 3: Exercises on Getting the GCD
Lesson 4: Getting the GCD by Prime Factorization
Lesson 5: GCD and Reducing Fractions to Lowest Terms

Least Common Multiple

Lesson 1:  Least Common Multiple Part 1
Lesson 2: Least Common Multiple Part 2
Lesson 3: Least Common Multiple Part 3

Rounding Numbers

Subtraction of Fractions Tutorial Series

Multiplication of Fractions Tutorial Series

Division of Fractions Tutorial Series

Comparing and Ordering Fractions

Fractions Tutorial Series

Lesson 1: Introduction to Fractions
Lesson 2: Representing Fractions
Lesson 3: Representing Fractions (Examples)
Lesson 4: Comparing Similar Fractions
Lesson 5: Comparing Fractions (Examples)
Lesson 6: Addition of Similar Fractions
Lesson 7: Addition of Similar Fractions (Examples)
Lesson 8: Subtraction of Similar Fractions
Lesson 9: Subtraction of Similar Fractions (Examples)
Lesson 10: Fractions Larger than 1
Lesson 11: Addition of Mixed Fractions (Similar Fractions)
Lesson 12: Subtraction of Mixed Fractions (Similar Fractions)
Lesson 13: Equivalent Fractions
Lesson 14: Comparing Dissimilar Fractions
Lesson 15: Reducing Fractions to Lowest Terms
Lesson 16: Converting Improper Fractions to Mixed Fractions
Lesson 17: Converting Mixed Fractions to Improper Fractions
Lesson 18: Addition of Dissimilar Fractions Part 1
Lesson 19: Addition of Dissimilar Fractions Part 2
Lesson 20: Addition of Mixed Fractions (Dissimilar Fractions)
Lesson 21: Subtraction of Mixed Fractions (Dissimilar Fractions)
Lesson 22: Multiplication of Fractions
Lesson 23: Reciprocal of a Number
Lesson 24: Division of Fractions

Decimals

Decimals

Lesson 1: How to Add Numbers with Decimals
Lesson 2: How to Subtract Numbers with Decimals
Lesson 3: How to Multiply Numbers with Decimals
Lesson 4: How to Divide Numbers wtih Decimals

Percent

Fraction Decimal Percent Conversion

Repeating Decimals

How to Subtract Integers

How to Multiply Integers

How to Divide Integers

PEMDAS and Order of Operations

Lesson 1: PEMDAS Order of Operations Part 1
Lesson 2: PEMDAS Order of Operations Part 2
Lesson 3: PEMDAS Order of Operations Part 3

PEMDAS Tutorial Series (New!)

Integers

Lesson 1: Positive and Negative Integers
Lesson 2: Introduction to the Number Line
Lesson 3: How to Compare Numbers on the Number Line
Lesson 4: Definition of Absolute Value
Lesson 5: How to Add Integers on the Number Line (Part 1)
Lesson 6: How to Add Integers on the Number Line (Part 2)
Lesson 7: Addition of Integers Using Chips
Lesson 9: Application of Properties of Addition
Lesson 10: How to Subtract Integers Using the Number Line Part 1
Lesson 11: Subtraction of Integers Worked Examples 1
Lesson 12: How to Subtract Integers Using the Number Line Part 2
Lesson 13: Subtraction of Integers Worked Examples 2
Lesson 14: Subtraction of Integers Using Chips
Lesson 15: Addition and Subtraction of Integers Worked Examples
Lesson 16: Summary of Addition and Subtraction of Integers
Lesson 17: Introduction to Multiplication of Integers
Lesson 18: Multiplication of Integers Worked Examples
Lesson 19: Properties of Multiplication
Lesson 20: How to Use the Exponent Notation
Lesson 21: Division of Integers
Lesson 22: Division of Integers Worked Examples
Lesson 23: Integer Multiplication and Division Worked Examples
Lesson 24: Introduction to PEMDAS
Lesson 25: The Distributive Property

Ratio and Proportion

Scientific Notation