Making Tens Addition
Making Friendly Numbers Addition
Doubles and Near Doubles
Breaking Up into Place Value
Adding Up in Chunks
Adding Up
Adding Up Subtraction
Subtraction Removal
Adjust One Number
Keep a Constant Distance
Friendly Numbers Multiplication
Partial Product Multiplication
Doubling or Halving-Multiplication
Breaking Factors into Smaller Factors
Multiplying Up
Partial Quotients Division
