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Awesome-omni-skill calculator

Performs basic arithmetic operations including addition, subtraction, multiplication, and division. Use when the user needs to calculate numerical results, perform math operations, or solve arithmetic problems.

install
source · Clone the upstream repo
git clone https://github.com/diegosouzapw/awesome-omni-skill
Claude Code · Install into ~/.claude/skills/
T=$(mktemp -d) && git clone --depth=1 https://github.com/diegosouzapw/awesome-omni-skill "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/backend/calculator" ~/.claude/skills/diegosouzapw-awesome-omni-skill-calculator && rm -rf "$T"
manifest: skills/backend/calculator/SKILL.md
source content

Calculator Skill

This skill performs basic arithmetic calculations.

When to Use

Use this skill when:

  • The user asks to perform mathematical calculations
  • Addition, subtraction, multiplication, or division is needed
  • Numerical results need to be computed
  • The user mentions terms like "calculate", "add", "subtract", "multiply", "divide", "sum", "difference", "product", or "quotient"

Instructions

  1. Identify the operation the user wants to perform:

    • Addition: combining two or more numbers
    • Subtraction: finding the difference between numbers
    • Multiplication: repeated addition or scaling
    • Division: splitting into equal parts

  2. Extract the numbers from the user's request

  3. Perform the calculation:

    • For addition: Add all numbers together
    • For subtraction: Subtract the second number from the first
    • For multiplication: Multiply the numbers together
    • For division: Divide the first number by the second

  4. Handle edge cases:

    • Division by zero: Return an error stating "Division by zero is not allowed"
    • Very large numbers: Use appropriate precision
    • Decimal numbers: Maintain precision to at least 2 decimal places

  5. Present the result clearly with the operation performed

Examples

Example 1: Addition

Input: "What is 15 + 27?" Steps:

  1. Operation: Addition
  2. Numbers: 15 and 27
  3. Calculation: 15 + 27 = 42 Output: "The sum of 15 and 27 is 42"

Example 2: Division

Input: "Divide 100 by 4" Steps:

  1. Operation: Division
  2. Numbers: 100 and 4
  3. Calculation: 100 ÷ 4 = 25 Output: "100 divided by 4 equals 25"

Example 3: Multiplication with decimals

Input: "Calculate 3.5 times 8" Steps:

  1. Operation: Multiplication
  2. Numbers: 3.5 and 8
  3. Calculation: 3.5 × 8 = 28 Output: "3.5 multiplied by 8 equals 28"

Example 4: Division by zero (error case)

Input: "What is 10 divided by 0?" Steps:

  1. Operation: Division
  2. Numbers: 10 and 0
  3. Detect division by zero Output: "Error: Division by zero is not allowed. Please provide a non-zero divisor."

Common Edge Cases

  • Division by zero: Always check if the divisor is zero before performing division
  • Negative numbers: Handle negative results appropriately
  • Decimal precision: Round results to a reasonable number of decimal places (typically 2-4)
  • Very large numbers: Be aware of potential overflow issues
  • Multiple operations: If the user requests multiple operations, perform them in the correct order (following PEMDAS/BODMAS if applicable)

Tips

  • Always confirm the operation and numbers with the user if ambiguous
  • Show your work when helpful for understanding
  • Use clear mathematical notation in your response
  • For complex expressions, break them down into simpler steps