Combined Operations with Common Fractions

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Presentation transcript:

Combined Operations with Common Fractions Unit 10 Combined Operations with Common Fractions

Basic Principles of Combined Operations with Common Fractions Follow the rules for addition, subtraction, multiplication, and division of common fractions to solve problems that combine operations with common fractions. The first step in solving these problems is determining which operations are needed and in what order.

Basic Principles of Combined Operations with Common Fractions Convert everything to the same units. Convert all fractions used in addition or subtraction to the lowest common denominators. Do the math necessary to solve the problem.

Combined Operations with Common Fractions Example: Solve Solve the first half of the problem:

Combined Operations with Common Fractions Solve within parentheses, then add: Remember to reduce the answer to the lowest terms.

Practical Problem A patient is taking 2 1/2 milligrams (mg) of Valium tid (three times a day). If each Valium tablet contains 5 mg, how many tablets does the patient take every day?

Practical Problem Set up the problem and solve within parentheses first: The patient takes 1 1/2 tablets each day.