📝 Add and Subtract Decimals Word Problems

📖 What the Section Is About

In this lesson, students use their skills in adding and subtracting decimals to solve real-world word problems. They practice applying decimals to money, measurement, and everyday situations. This helps them understand why decimal operations are useful in daily life.

🎯 Learning Objectives

✅ Read and understand word problems with decimals
✅ Decide whether to add or subtract based on the problem
✅ Solve money and measurement problems using decimals
✅ Check answers by estimating before solving
✅ Explain solutions in words and numbers

🧪 Examples

  • A pen costs $1.75 and a notebook costs $2.50. How much do they cost together? → $4.25

  • A rope is 5.2 meters long. If 2.8 meters is cut off, how much is left? → 2.4 meters

  • You have $10.00. You spend $6.45. How much money remains? → $3.55

  • A taxi ride costs $7.25 and a bus ride costs $1.50. What’s the total? → $8.75

📘 Key Vocabulary and Definitions

  • Word Problem: A math question written in sentences that describes a real-life situation

  • Total: The result when adding numbers

  • Difference: The result when subtracting numbers

  • Estimate: A close guess of the answer before solving

  • Operation: A math action like addition or subtraction

🎲 Fun Practice Activities

  1. Activity Worksheet: Solve 6 word problems with money and length using decimals

  2. Test Yourself: “A sandwich costs $3.45. A drink costs $1.55. How much do they cost together?”

🏡 Offline Homework Idea

Check a supermarket receipt. Add two items to find their combined cost, and subtract an item’s price from your money to see how much change you’d get.