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Grade 4 Math · World 2: Big Number Bridge · Level 13
Regroup More Than Once
Add when several places make a new ten, hundred, or thousand.
Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.
What children learn in Level 13
- What is 4,678 plus 2,545? Start with the ones: 8 plus 5 is 13. That's 1 ten and 3 ones.
- Tens: 7 plus 4, plus the new ten, is 12 tens. That's 1 hundred and 2 tens. Hundreds: 6 plus 5, plus the new hundred, is 12 hundreds: 1 thousand and 2 hundreds.
- Thousands: 4 plus 2, plus the new thousand, is 7 thousands. So 4,678 plus 2,545 is 7,223.
- You can also add the places first and put them together: 6,000 + 1,100 + 110 + 13 is 7,223 too. Use the way that makes sense to you!
Georgia's K-12 Mathematics Standards:
- 4.NR.2.1 — Fluently add and subtract multi-digit numbers to solve practical, mathematical problems using place value understanding, properties of operations, and relationships between operations.