Description 4. Addition and Subtraction of Decimals 1. Addition of Decimals with the Same Number of Digits 2. Subtraction of Decimals with the Same Number of Digits 3. Addition and Subtraction of Decimals with Different Numbers of Digits Unit Review Check with Word Problems Take a Break 5. Multiplication of Decimals 0. Multiplication of Whole Numbers 1. Placement of the Decimal Point in a Product 2. (Decimal) × (Whole Number) ① 3. (Decimal) × (Whole Number) ② 4. (Whole Number) × (Decimal) 5. (Decimal) × (Decimal) ① 6. (Decimal) × (Decimal) ② Unit Review Check with Word Problems Take a Break 6. Division of Decimals 0. Division of Whole Numbers 1. The Meaning of Division 2. (Decimal) ÷ (Whole Number) 3. Dividing Small Numbers 4. Dividing by a Decimal 5. Remainders After Sharing 6. Estimating the Quotient Unit Review Check with Word Problems Take a Break Answers and Explanations