5: Arithmetic in Base Ten Last updated Save as PDF Page ID 35075 Illustrative Mathematics OpenUp Resources Section 26: Warming Up to Decimals 26.1: Using Decimals in a Shopping Context Section 27: Adding and Subtracting Decimals 27.1: Using Diagrams to Represent Addition and Subtraction 27.2: Adding and Subtracting Decimals with Few Non-Zero Digits 27.3: Adding and Subtracting Decimals with Many Non-Zero Digits Section 28: Multiplying Decimals 28.1: Decimal Points in Products 28.2: Methods for Multiplying Decimals 28.3: Using Diagrams to Represent Multiplication 28.4: Calculating Products of Decimals Section 29: Dividing Decimals 29.1: Using the Partial Quotients Method 29.2: Using Long Division 29.3: Dividing Numbers that Result in Decimals 29.4: Dividing Decimals by Whole Numbers 29.5: Dividing Decimals by Decimals Section 30: Let's Put It to Work 30.1: Using Operations on Decimals to Solve Problems 30.2: Making and Measuring Boxes