Add a two-digit and a one-digit number – with regrouping

key notes :

🧠 What Is Regrouping?

• Regrouping means carrying a number to the next place value.
• When the ones add up to 10 or more, we regroup! 🔄✨

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🔢 Place Value Reminder

• Tens (T) ➝ groups of 10
• Ones (O) ➝ single units
• Example: 27 = 2 tens and 7 ones 🎈🎈

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📝 Steps to Add With Regrouping

1️⃣ Step 1: Add the Ones

• Add the digits in the ones place first.
• If the sum is 10 or more, regroup!
• Example: 7 + 5 = 12 ➝ write 2 in ones, carry 1 to tens 💥

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2️⃣ Step 2: Regroup

• Carry the extra ten to the tens place.
• ✍️ Write it above the tens column.

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3️⃣ Step 3: Add the Tens

Add the tens digits plus the carried number.

Example:

• Tens: 2 + 1 (carried) = 3
• So, 27 + 5 = 32 ✔️

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🎯 Example

27 + 8

• Ones: 7 + 8 = 15 ➝ write 5, carry 1
• Tens: 2 + 1 = 3
• ✔️ Answer: 35

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💡 When Do We Regroup?

When the ones place total is 10 or more.

Some sums with regrouping:

• 18 + 7 ➝ 25
• 26 + 5 ➝ 31
• 39 + 4 ➝ 43

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🎉 Tips for Students

• Always start from the ones ➝ 👉 O first, then T.
• Circle regrouping numbers to remember them! 🔵
• Practice with real objects like sticks or beads 🍡✨

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🌈 Fun Visual Reminder

• If the ones burst into 10,
  🎈🎈🎈🎈🎈🎈🎈🎈🎈🎈
  you must send 1 balloon to the tens! 🎈➡️🔟

Learn with an example

Let’s practice!🖊️