2-Digit Addition With Regrouping Worksheets
These worksheets focus on 2-digit addition problems that require carrying (regrouping) a ten into the next column. They're written for 2nd graders who already add without regrouping and are ready to learn what happens when the ones column adds up to 10 or more, and they include a printable answer key for quick checking.
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2-Digit With Regrouping Addition Worksheet
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2-Digit With Regrouping Addition Worksheet
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How to teach regrouping (carrying) in double-digit addition
- 1
Model with base-ten blocks first
Build both numbers with ones cubes and tens rods, combine the ones, and physically trade ten loose cubes for one rod to show why a 1 gets carried.
- 2
Label the columns
Have your child write small 'tens' and 'ones' headers above the columns so they always know which digit they're adding.
- 3
Practice the carry notation
Show exactly where the small carried '1' gets written above the tens column, and require it be written every time, never done mentally.
- 4
Check with an estimate
Before solving, ask them to round both numbers to the nearest ten and estimate the sum, then compare that estimate to their final answer.
Common mistakes kids make
- Forgetting to carry the regrouped ten — remind them the ones column can never show a two-digit number in the answer.
- Adding the carried 1 into the ones column instead of the tens column — have them physically move their pencil up before writing it.
- Dropping the carried digit partway through the problem — require writing it immediately after adding the ones.
- Misaligning digits that have a different number of place values — insist on lining up the ones column against a printed grid.
Tips for parents and teachers
- Color-code the ones column and tens column differently until the process feels automatic.
- Let kids check their own work by adding the columns in reverse order.
- Introduce regrouping with hands-on manipulatives before moving to pencil-and-paper only.
- Review single-digit facts to 18 first, since shaky facts make regrouping errors more likely.
Grade alignment
This worksheet supports Common Core standard 2.NBT.B.5, typically taught in 2nd grade. Use it for practice, homework, review or a timed check of fluency.
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Open worksheetFrequently asked questions
What is regrouping in addition?
Regrouping, also called carrying, happens when the sum of a column is 10 or more, so you write down the ones digit and carry the extra ten to the next column.
When do kids learn 2-digit addition with regrouping?
Most students learn this skill in 2nd grade, aligned with Common Core standard 2.NBT.B.5.
Why does my child keep forgetting to carry?
It's usually a working-memory issue; having them write the carried digit immediately, every time, instead of trying to remember it helps.
Is regrouping the same as borrowing?
No, regrouping in addition means carrying a ten forward, while borrowing is the subtraction equivalent that takes a ten from the next column.
How can I make regrouping practice hands-on?
Base-ten blocks let kids physically trade ten ones cubes for one tens rod, which mirrors exactly what the carried digit represents.
What should my child know before this worksheet?
They should be fluent adding single digits to 18 and comfortable adding 2-digit numbers that don't require regrouping.