How to Approach Word Problems
Learn a step-by-step strategy to solve any math word problem with confidence.
Definition
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Worked Examples
Emma has 24 stickers. She gives 8 stickers to her brother and then buys 12 more. How many stickers does Emma have now?
UNDERSTAND: What do we know?
Emma starts with 24 stickers, gives away 8, then gets 12 more → Start: 24, Give: 8, Get: 12
UNDERSTAND: What are we finding?
How many stickers Emma has at the end → Find the final amount
PLAN: What operations do we need?
Give away = subtract, Get more = add →
SOLVE: Do the math in order
, then → stickers
CHECK: Does it make sense?
She gave some away (less) then got more (more). 28 > 24. Yes! → Answer is reasonable
Answer: Emma has stickers.
Common Mistakes
Starting to calculate before fully reading the problem
Why it's wrong: Students see numbers and immediately start adding or multiplying, missing important details or the actual question.
Correct: Always complete the UNDERSTAND step first. Read the entire problem, identify what you know and what you need to find.
Ignoring key words that indicate operations
Why it's wrong: Words like 'altogether,' 'remaining,' 'each,' and 'shared equally' tell you what operation to use.
Correct: Highlight or underline key words. 'Total' often means add, 'left' often means subtract, 'each' often means multiply or divide.
Forgetting to check if the answer makes sense
Why it's wrong: A calculation error might give an impossible answer (like negative apples or more than you started with).
Correct: Always ask: Does this answer make sense for the story? Is it reasonable?
Answering a different question than what was asked
Why it's wrong: The problem might ask for the remaining amount, but students calculate the total.
Correct: Circle or highlight the question. Before writing your final answer, re-read what the problem asks for.
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Practice Problems
15 problemsWhat is the FIRST step in the UPSC strategy for solving word problems?
Why It Matters
- Shopping: Figure out if you have enough money or calculate discounts
- Cooking: Adjust recipes or measure ingredients
- Planning: Determine how much time you need or how to split things fairly
- Games & Sports: Calculate scores, distances, or statistics
Real World Applications
Shopping and Budgeting
Every shopping trip involves word problems: Do I have enough money? How much change will I get?
Example:
You have 20 dollars. A book costs 12 dollars and a pen costs 3 dollars. How much money will you have left after buying both?
You have 50 dollars to buy school supplies. You need a notebook for 8 dollars, a pen set for 6 dollars, and a backpack for 25 dollars.
Do you have enough money? If yes, how much is left? If no, how much more do you need?
Step 1: Write the mathematical expression
Add up the costs first:
Sharing Fairly
Dividing things equally among friends or family is a common word problem.
Example:
You have 24 cookies to share equally among 6 friends. How many cookies does each friend get?
Your team won 36 prizes at the school fair. There are 9 team members. After sharing equally, each member decides to donate 1 prize to charity.
How many prizes does each team member keep?
Step 1: Write the mathematical expression
First divide, then subtract:
Time and Scheduling
Planning your day often requires solving word problems about time.
Example:
You need to be at school by 8:00 AM. It takes 15 minutes to get ready and 20 minutes to walk. What time should you wake up?
A movie starts at 3:30 PM. You want to arrive 15 minutes early to get snacks. The bus ride takes 25 minutes and you need 10 minutes to walk to the bus stop.
What time should you leave home?
Step 1: Write the mathematical expression
Add up the time needed:
Key Takeaways
- 1Use the UPSC Strategy: Understand, Plan, Solve, Check
- 2Understand: Read carefully, identify what you know and what to find
- 3Plan: Decide which operations to use and in what order
- 4Solve: Do the math step by step
- 5Check: Make sure your answer makes sense and answers the question
- 6Key words like 'total,' 'left,' 'each,' and 'shared' hint at which operation to use
Frequently Asked Questions
Glossary
- Word problem
- A math question written as a story or real-life situation
- UPSC Strategy
- A 4-step approach: Understand, Plan, Solve, Check
- Key words
- Words in a problem that hint at which operation to use (like 'total,' 'remaining,' 'each')
- Multi-step problem
- A problem that requires more than one operation to solve
- Reasonable answer
- An answer that makes sense in the context of the problem