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3rd Grade Math
11. 3.NBT.A.2
11.1 Addition with Regrouping Up to 1000
Addition with Regrouping Up to 1000
Learn to add and regroup 3-digit numbers up to 1000 by carrying extra ones, tens, and hundreds into the next place value column.
What You'll Learn
Recognize when a column's sum reaches 10 or more and needs to be regrouped into the next place value.
Apply the rule that 10 ones become 1 ten and 10 tens become 1 hundred when carrying.
Solve 3-digit addition problems such as \( 246 + 137 \) by adding ones, then tens, then hundreds in order.
Write the carried digit above the next column before adding that column's values.
Check answers with estimation to confirm a regrouped sum like \( 358 + 276 = 634 \) is reasonable.
What You'll Practice
1
Adding two three-digit numbers with regrouping in multiple places
2
Solving addition problems that require carrying from ones to tens
3
Computing sums where regrouping occurs in tens and hundreds columns
Why This Matters
Addition with regrouping is essential for handling money, measuring distances, and solving everyday math problems. This skill builds the foundation for multi-digit multiplication, long division, and mental math strategies you'll use throughout your education and daily life.
This Unit Includes
1 Video lesson
Practice exercises
Learning resources
Skills
Addition
Regrouping
Place Value
Three-Digit Numbers
Carrying
Mental Math
OH Curriculum Aligned