Page 49 - BUSINESS MATHEMATICS MODULE 1 (WHOLE)_revised 10.20.2020

LESSON 3. ORDER OF OPERATION

3. Evaluate 150 ÷ (6 + 3 x 8) - 5 using the order of operations.
Solution:

Multiplication
Step 1: 150 ÷ (6 + 3 x 8) - 5 = 150 ÷ (6 + 24) - 5
inside Parentheses

Addition inside
Step 2: 150 ÷ (6 + 24) - 5 = 150 ÷ 30 - 5
Parentheses

Step 3: 150 ÷ 30 - 5 = 5 - 5 Division

Step 4: 5 - 5 = 0 Subtraction

4. Evaluate the arithmetic expression below:

Solution:

This problem includes a fraction bar (also called a vinculum), which means we M1_L3
must divide the numerator by the denominator. However, we must first perform all

calculations above and below the fraction bar BEFORE dividing.

Thus,

Evaluating this expression,

we get:

5. Write an arithmetic expression for this problem. Then evaluate the expression using the
order of operations.

a. Mr. Smith charged Jill ₱1,600 for parts and ₱750 per hour for labor to repair her
bicycle. If he spent 3 hours repairing her bike, how much does Jill owe him?

Solution: 1,600 + 3 x 750 = 1,600 + 3 x 750 = 1,600 + 2,250 = 3,850

Answer: Jill owes Mr. Smith ₱3,850.

BUSINESS MATHEMATICS: Module 1 3.5 | P a g e