Calculator inputs
Enter clue counts and known values. Then compare the operation scores.
Example data table
| Word Problem Pattern | Likely Operation | Example Equation | Reason |
|---|---|---|---|
| Ali has 14 marbles and gets 6 more. | Addition | 14 + 6 = 20 | Joining two amounts suggests a total. |
| Sara had 18 pencils and lost 5. | Subtraction | 18 - 5 = 13 | Something is removed from a starting amount. |
| There are 4 bags with 7 apples each. | Multiplication | 4 × 7 = 28 | Equal groups suggest repeated addition. |
| 24 cookies are shared equally among 6 children. | Division | 24 ÷ 6 = 4 | A total is split into equal shares. |
Formula used
This tool uses score formulas and practice equations together.
Addition Score
(3 × Total Clues) + (2 × Combine Hint) + (2 × Total Unknown) + Change Bonus
Subtraction Score
(3 × Difference Clues) + (2 × Compare Hint) + (2 × Difference Unknown) + Comparison Bonus
Multiplication Score
(3 × Groups Clues) + (2 × Equal-Groups Hint) + (2 × Product Unknown) + Complete-Groups Bonus
Division Score
(3 × Sharing Clues) + (2 × Sharing Hint) + (2 × Quotient Goal) + Valid-Sharing Bonus
Practice equations
- Addition:
Starting Amount + Change Amount - Subtraction:
Starting Amount - Change Amount - Multiplication:
Equal Groups × Items per Group - Division:
Total Items ÷ People or Groups - Confidence:
Top Score ÷ Total Score × 100
The highest score becomes the recommended operation for practice.
How to use this calculator
- Choose the problem style that best matches the wording.
- Select what the question is asking you to find.
- Count operation clues such as total, left, groups, or sharing.
- Enter any useful values from the word problem.
- Paste the full problem text for quick review later.
- Press Determine Operation to see the result above the form.
- Read the explanation, inspect the score table, and review the graph.
- Download the result as CSV or PDF for revision.
Frequently asked questions
1. What does this calculator actually decide?
It estimates whether a word problem most likely needs addition, subtraction, multiplication, or division. It does this by scoring clue words, question goals, and simple numeric structures.
2. Can it read the full text automatically?
This version stores your text for review, but it does not fully parse grammar. You still enter clue counts and values to practice careful reading.
3. Why are there four different practice values?
The table shows what each operation would produce using your inputs. Comparing them helps you understand why one operation fits better than the others.
4. What should I count as a total clue?
Words such as total, altogether, in all, combined, and sum usually raise the addition score. These clues often point to joining amounts.
5. What should I count as a difference clue?
Words such as left, fewer, remain, difference, and how many more usually support subtraction. These clues often compare or remove amounts.
6. When should I expect multiplication?
Choose multiplication when the problem describes equal groups, repeated sets, rows, arrays, or a constant amount repeated several times.
7. When should I expect division?
Choose division when a total is shared equally, split into groups, or used to find each share, unit rate, or number of groups.
8. Can teachers use the exports for class practice?
Yes. The CSV export is useful for records and review sheets. The PDF export gives a neat snapshot for lessons, homework, or intervention folders.