Understanding Decimal Subtraction
Subtracting decimals is just like subtracting whole numbers, but with an
important extra step!
The key is to line up the decimal points first. This ensures you're subtracting tenths from tenths,
hundredths from hundredths, and so on. You can add zeros to make the numbers the same length if needed.
How to Subtract Decimals
1️⃣ Line up the decimal points (add zeros if needed)
2️⃣ Subtract just like with whole numbers
3️⃣ Bring down the decimal point in your answer
Let's Practice Together!
Example 1: Simple Subtraction
7.5
- 3.2
________
- 3.2
________
Example 2: With Different Decimal Places
9.63
- 2.4
________
- 2.4
________
First, rewrite as: 9.63 - 2.40
Parent Tips 🌟
- Money makes it real: Use dollar amounts to practice subtraction. "If you have $15.75 and spend $8.50, how much is left?"
- Line it up visually: Use graph paper or create columns to help your child align decimal points correctly.
- Estimate first: Encourage estimating answers before calculating (e.g., "9.63 - 2.4 is about 10 - 2 = 8") to check if their final answer makes sense.