Grade 3/Order of Operations
Parenthesis First: Addition (585)
Students learn the fundamental rule of order of operations: solve inside parenthesis first. Through simple addition problems, kids practice identifying parenthesis and solving them before completing the rest of the equation. This builds the foundation for understanding how parenthesis change the order of calculations.
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Teaching Notes
Emphasize that parenthesis means "do this first". Use visual cues like highlighting or drawing boxes around parenthesis. Encourage students to circle or underline parenthesis before solving. Model step-by-step solving with clear annotations.
Vocabulary
Parentheses: Symbols ( ) that group numbers.
Addition: Combining numbers to find a total.
Common Mistakes
- Solving left to right without checking for parenthesis first
- Forgetting to copy parenthesis in their work
- Confusion about which numbers are inside the parenthesis
- Not showing the intermediate step after solving parenthesis
- Adding numbers outside parenthesis first.
- Ignoring parenthesis altogether.
- Calculation errors within parenthesis.
Differentiation
SupportUse physical manipulatives or counters. Start with just 2 numbers inside parenthesis. Draw pictures for each step. Practice identifying and circling parenthesis before solving any problems.
ChallengeIntroduce nested parenthesis like ((2 + 3) + 4). Challenge with larger numbers. Ask them to create problems where parenthesis changes the answer significantly.
Discussion Questions
- Why do we need parenthesis in math? What do they tell us?
- What happens to the answer if we ignore the parenthesis?
- Can you create a real-world situation where parenthesis would be needed?
- Why are parenthesis important in math?
- How do parenthesis change an equation?
- What happens if we ignore parenthesis when solving?
- Can you create an equation using parenthesis and addition?
Extension Activities
- Create your own parenthesis problems and trade with a partner
- Find examples of parenthesis in recipes or instruction manuals
- Try problems with two sets of parenthesis
- Write a word problem that requires using parenthesis
Parent Tip
Have your child explain why they solve inside parentheses first.
Learning Path
Skill Cluster
Number Sense & Operations
Estimated Time
15 minutes
Skills Practiced
parenthesis first rulesimple order of operations
Prerequisites
- Basic Addition Facts
- Multi-Step Addition
Next Steps
- Parenthesis with Subtraction
- Mixed Operations in Parenthesis
- Order of Operations: Subtraction Only
- Mixed Operations: Parenthesis First
- Order of Operations: All Operations