Class 2 · Topic 3
2 & 3 Digit Addition & Subtraction
Step 1 · Learn
Read the ideas
- 🐇🔒
The Hopping Map
Add without paper: just hop.
- 💥🔒
Number Smashers
Break numbers apart to add in your head.
- 🧮🔒
Adding 2-Digit Numbers
Split a big sum into easy column sums.
- ➖🔒
Subtracting 2-Digit Numbers
Take away the ones, then the tens.
- 📤🔒
Adding with Carrying
Never lose the carried ten.
- 📥🔒
Subtracting with Borrowing
One ten breaks into ten ones to borrow.
- 🔢🔒
3-Digit Addition & Subtraction
Hundreds, tens, ones, column by column.
- 📖🔒
Word Problems
Join, take away, or find the gap?
- 🔮🔒
Estimate & Check
A rough answer catches big slips.
Step 2 · Practice
Try the quests
Step 3 · Boss Battle
Beat the boss
🛡️ 🛡️ 🛡️ 3 shields — lose all → 60-second cooldown
Round 1
Adding 2-Digit Numbers
🔒Round 2
Subtracting 2-Digit Numbers
🔒Round 3
Adding with Carrying
🔒Round 4
Subtracting with Borrowing
🔒Round 5
3-Digit Addition & Subtraction
🔒Round 6
Word Problems
🔒Round 7
Estimate & Check
🔒Round 8
The Hopping Map
🔒Round 9
Number Smashers
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