### 4th Grade - Unit 9 Math

 Unit 9: Decimals Text Mr. Yen's Videos Youtube Video Names and Links Page Chapter 19 - Understanding Decimals Location: Decimals / Place Value Lesson 1 - Hands On: Fractions and Decimals 418 Lesson 2 - Mixed Numbers and Decimals 420 Comparing Decimals Comparing Decimals Lesson 3 - Fractions and Decimal Equivalents 424 Ordering Decimals Ordering Decimals Lesson 4 - Compare and Order Decimals 426 Decimals and Fraction Equivalents Decimal and Fraction Equivalents Lesson 5 - Compare and Order Fractions and Decimals 428 Ordering Fractions and Decimals Ordering Decimals, Fractions, and Mixed Numbers Lesson 6 - PS Field Trip: National Yo-Yo Museum 432 Chapter Review / Test 436 Chapter 20 - Add and Subtract Decimals Location: Decimals / Place Value Lesson 1 - Hands On: Explore Addition and Subtraction of Decimals 440 Rounding Decimals to a Whole Number Rounding Decimals to Whole Numbers Lesson 2 - Round Decimals 442 Rounding DecimalsLocation: Adding & Subtracting Decimals Rounding Decimals Lesson 3 - Estimate Decimal Sums and Differences 446 Estimation with Decimals Adding and Subtracting Estimation When Adding and Subtracting Decimals Lesson 4 - Add and Subtract Decimals 448 Adding and Subtracting Decimals Adding and Subtracting Decimals Lesson 5 - Problem Solving Strategy: Work Backwards 452 Chapter Review / Test 456