Unit 16 Combined Operations with Decimal Fractions Basic

Unit 16 Combined Operations with Decimal Fractions

Basic Principles of Combined Operations with Decimal Fractions • Follow the rules for addition, subtraction, multiplication, and division of decimal fractions to solve problems that combine operations with decimal fractions.

Basic Principles of Combined Operations with Decimal Fractions • The first step in solving these problems is determining which operations are needed and in what order. • Do the math necessary to solve the problem. • Round off as directed.

Combined Operations with Decimal Fractions • Example: Solve – Round off answers to three places or thousandths.

Combined Operations with Decimal Fractions • Solve within parentheses first:

Combined Operations with Decimal Fractions – Finish the operations outside the parentheses: 0. 087 + 8. 004 =

Practical Problem • A registered nurse (RN) working in the operating room earns $980. 80 for a 40 -hour week. A certified surgical technician (CST) earns $747. 20 for a 40 -hour week. • What is the cost of labor for a 3 1/2 -hour surgery if one RN and two CSTs are assisting?

Practical Problem • First find the hourly rate for the RN: • Find the hourly rate for the CST:

Practical Problem • Now figure out how much the RN and two CSTs would earn in 3. 5 hours: – RN: – CSTs: – The RN and CSTs: – The total cost of labor is $216. 58.