Add three-digit numbers with and without regrouping
Subtract three-digit numbers with and without regrouping
Use place value understanding to align numbers correctly
Apply addition and subtraction to real-world problems
Use estimation to check if answers are reasonable
Develop fluency and confidence with three-digit operations
Learn to add three-digit numbers when no regrouping is needed. Master place value alignment and build foundational addition skills.
Master addition with regrouping! Learn when and how to 'carry' numbers when adding three-digit numbers.
Learn to subtract three-digit numbers when no regrouping is needed. Build confidence with straightforward subtraction.
Master subtraction with regrouping! Learn to 'borrow' from tens and hundreds when subtracting three-digit numbers.
Start Simple
Three-Digit Addition Without Regrouping
Add Complexity
Three-Digit Addition With Regrouping
Practice Transfer
Three-Digit Subtraction Without Regrouping
Master Challenge
Three-Digit Subtraction With Regrouping
Start with Lesson 1 and progress through all four lessons to build strong addition and subtraction skills!
Begin Unit 1