# Course - Arithmetic

Course Level: Elementary

The most basic of the math playlists. Start here if you have very little background in math fundamentals (or just want to make sure you do). After watching this playlist, you should be ready for the pre-algebra playlist.

• Lecture 1 - Basic Addition
• Lecture 2 - Addition 2
• Lecture 3 - Level 2 Addition
• Lecture 4 - Addition 3
• Lecture 5 - Addition 4
• Lecture 6 - Basic Subtraction
• Lecture 7 - Subtraction 2
• Lecture 8 - Subtraction 3; Introduction to Borrowing or Regrouping
• Lecture 9 - Alternate mental subtraction method
• Lecture 10 - Level 4 Subtraction
• Lecture 11 - Why borrowing works
• Lecture 12 - Adding Decimals
• Lecture 13 - Subtracting decimals
• Lecture 14 - Basic Multiplication
• Lecture 15 - Multiplication 2; The Multiplication Tables
• Lecture 16 - Multiplication 3; 10,11,12 times tables
• Lecture 17 - Multiplication 4; 2-digit times 1-digit number
• Lecture 18 - Multiplication 5; 2-digit times a 2-digit number
• Lecture 19 - Multiplication 6; Multiple Digit Numbers
• Lecture 20 - Multiplication 7; Old video giving more examples
• Lecture 21 - Mulitplication 8; Multiplying decimals (Old video)
• Lecture 22 - Lattice Multiplication
• Lecture 23 - Why Lattice Multiplication Works
• Lecture 24 - Division 1
• Lecture 25 - Division 2
• Lecture 26 - Division 3; More long division and remainder examples
• Lecture 27 - Level 4 division
• Lecture 28 - Converting fractions to decimals
• Lecture 29 - Percent and decimals
• Lecture 30 - Dividing decimal
• Lecture 31 - Ordering numeric expressions
• Lecture 32 - Greatest Common Divisor
• Lecture 33 - Least Common Multiple
• Lecture 34 - Equivalent fractions
• Lecture 35 - Mixed numbers and improper fractions