Multiplying Fractions

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Presentation transcript:

Multiplying Fractions 7th Grade Math Lesson Objective: Students will multiply fractions and mixed numbers.

Multiply Fraction Rule To multiply fractions, multiply the numerators and multiply the denominators.

Multiply Fractions – Basic Multiply. Write in simplest form. Rewrite Step: Must be on all homework practice.

Practice Session 1 Multiply. Write in simplest form.

Multiply Fractions – Simplifying before Multiplying Multiply. Write in simplest form. 1 1 4 1 Rewrite Step: Must be on all homework practice.

Practice Session 2 Multiply. Write in simplest form.

Multiply Mixed Numbers Multiply. Write in simplest form. 11 Rename the MN: Mixed numbers must be renamed as fractions greater than one to multiply. 1 Rewrite Step: Must be on all homework practice.

Multiply Mixed Numbers Multiply. Write in simplest form. 1 Rename the MN: Mixed numbers must be renamed as fractions greater than one to multiply. 1 Rewrite Step: Must be on all homework practice.

Practice Session 3 Multiply. Write in simplest form.

Real World Example The house cat has an average lifespan that is 4/5 of a lion’s. If a lion’s lifespan is 15 years, find the average lifespan of a house cat. 3 1

Practice Session 4 Each DVD storage case is about 1/5 inch thick. What will be the height of 12 cases sold together in plastic wrapping?