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Problem Skills in Problem Solving 4
 
Part I   Whole Numbers
  Unit 1   Addition and Subtraction I - Review 
             1.1 Part-Whole Model and Comparison Model
           
  Unit 2   Factors & Multiples
             2.1 Tests of Divisibility
             2.2 Systematic Listing   

  Unit 3   Multiplication and Division
             3.1 Unit Model Concept
             3.2 Simplify The Problem
             3.3 Make A Supposition

  Unit 4  Four Operations
             4.1 Difference-Multiple Model Concept
             4.2 Make-A-Whole Model Concept
             4.3 Internet-Transfer Model Concept
             4.4 Before-After Model Concept
             4.5 Restate In Another Way

Part II   Fractions
  Unit 5  Addition and Subtraction 
             5.1 Simplify The Calculation

  Unit 6  Fractions Of A Set
             6.1 Unit Model Concept

  Unit 7  Mixed Problems
             7.1 Unit Model Concept
             7.2 *Part-Whole Unit Model Concept
             7.3 Comparison Unit Model Concept
             7.4 *Parts-And-Units Model Concept

 Part III  Decimals
   Unit 8  Addition and Subtraction
              8.1 Part-Whole Model And Comparison Model

  Unit 9  Multiplication And Division
              9.1 Unit Model Concept
              9.2 Draw A Diagram

 Part IV  Area and Perimeter
   Unit 10  Area and Perimeter
              10.1 Restate In Another Way
              10.2 Systematic Listing  

Answer Key & Detailed Solutions