Unit+2

=__**Unit 2: Adding and Subtracting Whole Numbers**__ =
 * ==Using Mental Math to Add and Subtract ==
 * ==Estimating Sums and Differences of Whole Numbers ==
 * ==Adding Whole Numbers [|(Partial Sums Addition example)] [|(Column/Traditional Addition example)]==
 * ==Subtracting Whole Numbers ([|Trade First Subtraction example]) [|(Partial Differences Method)]==
 * ==Subtracting Across Zeros [|(slide examples--use arrows to advance)] ==
 * ==Solving Number Stories ==
 * ==Adding to Subtract [|(Counting Up Method)] ==