Understanding Decimal Subtraction
Subtracting decimals is just like subtracting whole numbers, but with an extra special step!
The key is to line up the decimal points perfectly. This makes sure we're subtracting tenths from tenths, hundredths from hundredths, and so on. Don't forget - if a number doesn't have a decimal, we can add .0 to help with alignment!
How to Subtract Decimals
1️⃣ Line up the decimal points (add zeros if needed)
2️⃣ Subtract each column starting from the right
3️⃣ Bring down the decimal point in your answer
Let's Practice Together!
Example 1: Shopping Math
Emma has $15.75 and wants to buy a book that costs $9.38. How much money will she have left?
Let's set it up:
15.75
- 9.38
________
What's the answer?
Example 2: Sports Challenge
In a race, Jake ran 50.6 meters and Sarah ran 37.85 meters. How much farther did Jake run?
Let's set it up (remember to add a zero to 50.6):
50.60
- 37.85
________
What's the answer?
Parent Tips 🌟
- Money makes it real: Use real coins and bills to practice decimal subtraction - kids love counting money!
- Kitchen math: When cooking, have your child subtract decimal measurements (like 1.5 cups - 0.75 cups).
- Race to zero: Make a game where you start with a decimal number (like 5.0) and take turns subtracting decimals until someone reaches zero.