Add a two-digit and a one-digit number – without regrouping

key notes :

🧠 What Does “Without Regrouping” Mean?

  • ✔️ It means no carrying!
  • ✔️ The ones place does not go above 9.
  • ✔️ You just add the ones normally.
    ✨ Example: 34 + 5 (4 + 5 = 9 → no regrouping)

🔢 Steps to Add Easily

🟦 Step 1: Write the Numbers Vertically

  34  
+  5

🟩 Step 2: Add Ones First

  • 4 (ones) + 5 (ones) = 9

🟨 Step 3: Add Tens

  • 3 tens + 0 tens = 3 tens

🎉 Step 4: Write Final Answer

👉 39

🎈 Place Value Helps!

✨ Break the number into tens and ones:

  • 34 → 3 tens + 4 ones
  • 5 → 0 tens + 5 ones
    🟢 Add ones → 4 + 5 = 9
    🔵 Tens remain same → 3

Final answer = 39

🌟 When Is Regrouping NOT Needed?

If the ones digits add up to 9 or less.

  • Example: 42 + 6 → 2 + 6 = 8 (no regrouping)
  • Example: 51 + 3 → 1 + 3 = 4 (no regrouping)

❌ But NOT: 47 + 6 → 13 (this needs regrouping)

🧩 Practice Examples (No Regrouping)

Try these:
✨ 23 + 4
✨ 31 + 7
✨ 64 + 5
✨ 52 + 6

🎯 Key Idea to Remember

👉 Add ones → Add tens → Done!
👉 If ones stay 0–9, it’s without regrouping! 🥳

💣Learn with an example💣

Add.

2+27= __

You can count up to add. It is easier to start with the larger number. Start from 27 and count up 2:
27, 28, 29
2+27=29
The sum is 29.

Add.

14+4 =

solution

You can count up to add. It is easier to start with the larger number.

Start from 14 and count up 4:

14, 15, 16, 17, 1814+4=18

The sum is 18.

Add.

26+1=

You can count up to add. It is easier to start with the larger number. Start from 26 and count up 1:
26, 27
26+1=27
The sum is 27.

Let’s practice!🖊️