Interactive Multiplication of Fractions (5th Grade) Dream Box – Fraction Multiplication. Students multiply two fractions together and use an area model to represent the product. Lesson CCSS.MATH.CONTENT.5.NF.B.4 Apply and extend previous understandings of multiplication to multiply a fraction or whole number by a fraction. Related posts: Interactive Adding and Subtracting Fractions (4th Grade) Interactive Fractions and Decimals (4th Grade) Interactive Multi-Digit Multiplication Area Model (4th Grade) Interactive Adding & Subtracting Rational Numbers (7th)