Unit 2: Decimal Operations & Conversions

Master decimal multiplication, division, and conversions to fractions and percentages!

Unit Overview

What You'll Learn

Multiply decimals by whole numbers using decimal grids and algorithms
Multiply decimals by decimals with proper place value understanding
Divide decimals using number lines and conversion methods
Convert between decimals, fractions, and percentages seamlessly
Apply decimal operations in real-world shopping and measurement scenarios

Key Skills

Decimal OperationsPlace ValueConversion MethodsReal-world ApplicationsAlgorithm DevelopmentVisual ModelsError CorrectionProblem Solving

Learning Objectives

Decimal Multiplication

• Use decimal grids for visual understanding
• Develop efficient multiplication algorithms
• Apply place value rules correctly
• Handle decimal point placement

Decimal Division

• Use number lines for visualization
• Convert to whole number division
• Apply division algorithms correctly
• Verify answers with multiplication

Conversions

• Convert decimals to fractions
• Convert fractions to decimals
• Convert decimals to percentages
• Compare different representations

Lessons in This Unit

Lesson 1: Decimal × Integer

Learn to multiply decimals by whole numbers using decimal grids and algorithm development.

Decimal GridsAlgorithm DevelopmentPlace Value+1 more

Stationery Shopping

Lesson 2: Decimal × Decimal

Master multiplying decimals by decimals using area models and decimal place value rules.

Area ModelsDecimal Place ValueError Correction+1 more

Lesson 3: Decimal Division

Understand dividing decimals using number lines and conversion to whole number division.

Number LinesConversion MethodsMultiplication Check+1 more

Juice Distribution

Lesson 4: Decimal-Fraction-Percent Conversions

Master converting between decimals, fractions, and percentages with real-world examples.

Conversion RulesPercentage GridsReal-world Applications+1 more

Prerequisites

Before starting this unit, make sure you're comfortable with:

Basic Decimal Concepts

• Understanding decimal place value
• Reading and writing decimals
• Comparing decimal numbers
• Basic decimal addition and subtraction

Fraction Basics

• Understanding fractions and decimals
• Basic fraction operations
• Converting simple fractions to decimals
• Understanding percentages

Success Tips

Decimal Operations

•Always count decimal places carefully
•Use visual models to understand concepts
•Estimate your answer first to check reasonableness
•Practice with real-world money examples

Conversions

•Remember the conversion rules and practice them
•Use percentage grids for visual understanding
•Always check your conversions make sense
•Connect conversions to real-world situations

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