Concept 5 of 9
Adding with Carrying
Today's big idea
When the ones pass nine, carry a ten to the tens column.
37 + 25: 7+5=12, write 2 carry 1 → 62.
How it works
👀 What's going on?
37 + 25: the ones make more than 9. Where do the extra ones go?
💡 Here's the trick
When the ones add past 9, carry a ten over to the tens column.
37 + 25: ones 7 + 5 = 12, so write 2 and carry 1. Tens 3 + 2 + 1 = 6. The answer is 62.
✍️ Try it
48 + 26: ones 8 + 6 = 14, write 4 carry 1. Tens 4 + 2 + 1 = 7. → 74.
⚠️ Watch out
The carried ten joins the tens column, so do not forget to add it.
Watch me solve one
Quanta solves it
“Watch how I think through one of these — then you try.”
THE PROBLEM
“Add 48 + 26.”
- 1
Ones pass ten — carry
8 + 6 = 14, so write 4 and carry 1 ten.
- 2
Tens, plus the carry
4 + 2 + 1 = 7.
- 3
Answer ✓
48 + 26 = 74
Now you try one — same steps, different story 👇
See it in action
⚡ Time to play!
Add the ones — it will pass ten.
37 + 25
7 + 5 = ?
Quick check
✅ VERIFICATION
What is 56 + 28?
⚡ Finish the activity above first to answer.
Keep going!
Up next: Subtracting with Borrowing
One ten breaks into ten ones to borrow.