← Section 2 Chapter 18: Adding and Subtracting Decimals Chapter 19 →

🔢 Adding and Subtracting Decimals

Master decimal calculations step by step!

✏️ Explanation

To add or subtract decimals, line up the decimal points and work from right to left.

🔍 Why It Matters

Adding and subtracting decimals is key in shopping, science, and measurement.

📌 Visual Flowchart

🧭 See chart: "Decimal Addition/Subtraction" (to be added)

✏️ Worked Example

1.2 + 0.45 = 1.65

🎯 Decimal Point Alignment Demo

  1.
+ 0.45
______
  1.65

Notice how the decimal points line up vertically!

🧮 Interactive Decimal Calculator

Click "Calculate" to see the step-by-step solution
Result: 1.65

🔢 Practice Exercises

1. 2.3 + 1.4 = ?
2. 4.56 - 2.1 = ?
3. 3.75 + 0.25 = ?
4. 6.03 - 5.99 = ?
5. 7.1 + 0.09 = ?

⚠️ Common Mistakes

  • Forgetting to line up decimal points
  • Dropping trailing zeros

✨ Quick Summary

Always align the decimal points when adding or subtracting.