Adding and Subtracting Big Numbers

In third grade, you'll use new ways to add and subtract numbers up to 1,000 and beyond!

Addition Tricks

• Regrouping (Carrying): When numbers add up to more than 9 in a column, you regroup the extras to the next place.
• Open Number Line: Draw a line and "jump" in parts to make adding easier.

Subtraction Tricks

• Regrouping (Borrowing): If you can't subtract a smaller number from a bigger one, borrow from the next place.
• Counting Up: Start at the smaller number and count up to the bigger number to find the difference.

Checking Your Work

Always double-check with the opposite operation!