Table of Contents
 Addition and Subtraction

Add ThreeDigit Numbers
 Rounding to the Nearest Ten
 Rounding to the Nearest Hundred
 Estimating Sums of TwoDigit Numbers: Rounding
 Estimating Sums of ThreeDigit Numbers: Rounding
 Estimating Sums of ThreeDigit Numbers: Compatible Numbers
 Mental Addition of Numbers up to 1,000
 Column Addition of ThreeDigit Numbers: Partial Sums
 Column Addition of ThreeDigit Numbers: No Regrouping
 Column Addition of ThreeDigit Numbers: Regroup Ones
 Column Addition of ThreeDigit Numbers: Regroup Tens
 Column Addition of ThreeDigit Numbers: Regroup Ones and Tens
 Adding Three or More Numbers

Subtract ThreeDigit Numbers
 Estimating Differences between ThreeDigit Numbers: Rounding
 Estimating Differences between ThreeDigit Numbers: Compatible Numbers
 Mental Subtraction of Numbers up to 1,000
 Column Subtraction of ThreeDigit Numbers: Partial Differences
 Column Subtraction of ThreeDigit Numbers: No Regrouping
 Column Subtraction of ThreeDigit Numbers: Regrouping Tens
 Column Subtraction of ThreeDigit Numbers: Regrouping Hundreds
 Column Subtraction of ThreeDigit Numbers: Regrouping Tens and Hundreds
 Column Subtraction of ThreeDigit Numbers: Subtracting across Zeros
 Relating Addition to Subtraction: Numbers up to 1,000
 Word Problems: Addition and Subtraction with Numbers up to 1,000
 Additive Comparison with Numbers up to 1,000
 Modeling TwoStep Addition and Subtraction Problems
 Model Multiplication
 Multiplication
 Model Division
 Division

Multiplication and Division
 Multiplication Tables
 Patterns in Multiplication Tables
 Multiplication Patterns
 Multiplying Odd and Even Numbers
 Relating Multiplication and Division
 Comparing Multiplication and Division Expressions
 Word Problems: Multiplication and Division
 Multiplying a OneDigit Number by a Multiple of 10
 Order of Operations: The Four Operations

Fractions
 Equal Parts
 Halves
 Quarters
 Thirds
 Dividing Shapes into Equal Parts
 Unit Fractions
 Nonunit Fractions
 Fractions on a Number Line
 Making a Whole
 Unit Fractions of a Quantity
 Finding the Whole Set
 Equivalent Fractions Using Models
 Equivalent Fractions on a Number Line
 Fractions Greater Than One
 Fractions Greater Than One on a Number Line
 Compare and Order Fractions
 Measure Length and Mass
 Measure Capacity and Time
 Perimeter and Area
 Geometry
 Statistics and Data