Subtraction: fill in the missing digits

key notes :

🔍 Understand the Place Values

• Subtraction happens digit by digit.
• Start from the ones ➜ tens ➜ hundreds place.
• Example:
  4 5 7
- 2 _ 4
  The missing digit is in the tens place! 🔢

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🤔 Identify the Missing Digit

• Look at the subtraction problem and find which digit is missing.
• Use reverse operation (addition) to check. ➕🔄➖
  If A – B = C, then B + C = A.

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🔁 Borrowing (Regrouping) May Be Needed

• If the top number is smaller than the bottom number, borrow 1 from the next place value.
• Example:
  6 _ 2
- 3 8 5
  You may need to borrow from tens or hundreds! 🧠💡

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🧮 Fill One Digit at a Time

• Solve step-by-step, beginning with the ones place.
• Don’t jump to the missing digit too quickly — solve using logic! 🧠

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✅ Check Your Answer

• Use addition to verify if your missing digit is correct:
  Subtraction Result + Subtrahend = Minuend
• Example:
  If _ = 4, check if the problem becomes correct! ✔️

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🔡 Use Trial and Error When Needed

• If you’re unsure, try digits from 0 to 9.
• Check which one makes the subtraction correct. 🎯

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🚧 Common Mistakes to Avoid

❌ Forgetting to borrow when needed
❌ Writing digits in the wrong place value
❌ Not checking the final answer

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🌟 Quick Tip

Always write numbers neatly in columns (ones under ones, tens under tens) to avoid mistakes! 📍✨

Learn with an example

Let’s practice!