Child Safe
Parent Monitoring
Evaluate Numerical Expressions with ( ), { } and [ ] – Part 1
Overview
Math problems can be written with more than one operation. To solve these more
difficult problems, we follow a sequence called the order of operations.
Consider the numerical expression
There are two possible solutions to this problem:
How do I know which part of the problem to solve first?
The order of operations will guide you.
ORDER OF OPERATIONS:
Step One: Calculate operations in grouping symbols first. Grouping symbols include parentheses, brackets or braces. If an expression has more than one grouping symbol, calculate the operations in parentheses first, brackets second, and braces third.
Step Two: Solve exponents, including square roots. It’s okay if you aren’t familiar
with these terms yet. We will learn more about them in an upcoming chapter.
Step Three: Multiply and Divide. If both multiplication and division appear in an
expression, complete the operations from left to right.
Step Four: Add and Subtract. If both addition and subtraction appear in an
expression, complete the operations from left to right.
PEMDAS
You can use the acronym PEMDAS to help you remember the order of operations.
P – Parentheses, Brackets, Braces
E – Exponents
MD – Multiplication/Division
AS – Addition/Subtraction
Let’s look at another example.
K8 New
Free
save 68%
Our monthly subscription plan offers unlimited access to all of our premium video lectures, practice questions, and quizzes. If you want on-demand access to our educational resources, this plan is perfect for you.
Our data shows that 96% of those who get our award-winning K-8 Math & Reading program stick with it.
These are parents just like you with kids just like yours. They start watching and… keep going.
Solve
Show your work.
Answer
17
First, calculate
Which part of the expression should be calculated first? Explain your answer.
A.
B.
C.
D.
Answer
D. 6 – 3
Parentheses should be solved before brackets or braces.
Add parentheses to the equation without changing it’s value.
Answer
First, calculate 7 + 8 = 15. Then, multiply by 3.
Solve
Show your work.
Answer
22
First, calculate (8 – 3) = 5. Then add 5 + 6. The multiply
Which numerical expression has the same value as
A.
B.
C.
D.
Answer
B.
Both expressions are equal to 29.
Click on the quizzes below to test your knowledge.
Remember: Practice Makes Progress
1
Please select your grade level:
2
Please select a subject that interests you:
1
Start your practice test:
1
Start your practice test:
Read more!
Create your free account to see answers!
Welcome
You have successfully logged in.
Click to show more