Contents:
Basic Addition - Addition - Basic Subtraction - introduction to Borrowing or Regrouping - Alternate mental subtraction method - Why borrowing works-Why borrowing works - Adding Decimals -Subtracting decimals - Basic Multiplication - Multiplication 2: The Multiplication Tables - 10,11,12 times tables, 2-digit times 1-digit number, Multiple Digit Numbers,Old video giving more examples,Multiplying decimals (Old video)

Lattice Multiplication - Why Lattice Multiplication Works - Division - More long division and remainder examples - Converting fractions to decimals - Percent and decimals - Dividing decimal -Ordering numeric expressions - Greatest Common Divisor - Least Common Multiple-Equivalent fractions - Mixed numbers and improper fractions

How I subtract in my head