Addition

Hello Math Explorer! Get ready for an exciting adventure.

Each topic has fun activities and games to help you learn. Complete all sections to learn well!

Adding two two-digit numbers is fun! Let's learn how to add them step by step!

Example: 34 + 27

1. Start at the right (units place): add 4 + 7 = 11
2. Carry over: since 11 ≥ 10, write down 1 and carry 1 to the tens place
3. Add the tens: 3 (tens digit) + 2 (tens from second number) + 1 (carried) = 6
4. Combine: write down 6 in the tens place → result is 61

Subtracting big numbers is fun when you know how! We'll work with 4-digit numbers:

1. Start from the right (units place)

2. Subtract digits in the same place

3. Borrow from next place if needed

4. Remember: Borrowing means taking 10 from next column

Try solving this problem step by step!

After solving math problems, we can write the answer in words!

Here's how to write number names:

• Numbers 0-9: zero, one, two, three, four, five, six, seven, eight, nine
• Numbers 10-19: ten, eleven, twelve, thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen
• Tens places: twenty, thirty, forty, fifty, sixty, seventy, eighty, ninety
• For two-digit numbers: tens + units (e.g., 25 = twenty-five)

Let's practice writing the answer in words!