Lesson 12.2 Fractions: Multiplication 1

This lesson extends the concepts and procedures for multiplication of whole numbers to fraction multiplication; namely, that multiplication can be represented as repeated addition or with an area model. Connecting to students’ prior knowledge makes fraction multiplication meaningful, its procedures plausible, and helps to ensure better retention.

Previous fractions lessons included the use of manipulatives, pictures, and sense-making strategies to address fraction concepts (the meaning of parts and wholes; fraction equivalence and comparisons; and fraction, decimal, and percent conversions), and addition and subtraction rules. Later lessons will explore fraction division and decimal multiplication and division. Many opportunities for practice with rational numbers concepts and procedures are provided throughout a 15-week period.

Math Background 1 (TP11) connects previous models to current work. Other math backgrounds provide adult justifications for fraction multiplication procedures.

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