Class 2 · Topic 3
2- & 3-Digit Addition & Subtraction
Step 1 · Learn
Read the ideas
- 🐇🔒
The Hopping Map
Hop the tens, then the ones.
- 💥🔒
Number Smashers
Add the tens, add the ones, join them.
- 🧮🔒
Adding 2-Digit Numbers
Line up the columns, then add each one.
- ➖🔒
Subtracting 2-Digit Numbers
Line up the columns, then subtract each one.
- 📤🔒
Adding with Carrying
Ten ones become one ten, carried over.
- 📥🔒
Subtracting with Borrowing
One ten breaks into ten ones to borrow.
- 🔢🔒
3-Digit Addition & Subtraction
Hundreds, tens, ones, column by column.
- 📖🔒
Word Problems & Estimating
Clue words pick add or subtract; round to check.
- 🔮🔒
Estimate to Check
38 + 41 is about 40 + 40 = 80.
Step 2 · Practice
Try the quests
Step 3 · Boss Battle
Beat the boss
🛡️ 🛡️ 🛡️ 3 shields — lose all → 60-second cooldown
Round 1
Two chests hold 43 and 34 coins.
🔒Round 2
A rope bridge has 89 planks. You cross 35…
🔒Round 3
A pouch has 58 gems. You find 27 more.
🔒Round 4
A dial reads 71. A trap drops it by 46.
🔒Round 5
A door code adds 268 and 175.
🔒Round 6
A treasure had 250 coins. 130 were taken,…
🔒Round 7
A shop sign claims 29 + 42 = 15.
🔒Round 8
A vault dial sits on 48. You must hop it…
🔒Round 9
The reactor needs 56 + 27 units. Smash the…
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