Subtraction Calculator

What is Subtraction?

Subtraction is the mathematical operation of finding the difference between two numbers. It can be thought of as "taking away" or finding how much more one number is than another.

Subtraction Methods

• Counting back: Start from minuend, count backwards
• Adding up: Count from subtrahend up to minuend
• Decomposition: Break numbers into place values
• Number line: Move left from starting position

Real-World Applications

• • Finance: Calculating change, expenses, savings
• • Measurement: Finding differences in length, weight, time
• • Temperature: Temperature changes and differences
• • Sports: Score differences, time remaining
• • Inventory: Stock reduction, remaining quantities
• • Age: Age differences between people

Common Mistakes

• • Confusing minuend and subtrahend order
• • Mishandling negative numbers
• • Borrowing errors in multi-digit subtraction
• • Not aligning decimal points properly