🎓 Grade 2📄 Free PDF✅ Answer Keys🎯 4 Classroom Sets

2-Digit Addition With Regrouping · Free Worksheets (Grade 2)

Q: How do you solve a 2-digit addition with regrouping problem step by step?

Here is a worked example: "Calculate vertically: 48 + 27". Solution: 1. Add the ones: 8 + 7 = 15. 2. Regroup: Write 5 below, write 1 in the carry box above the tens. 3. Add the tens: 1 (carried) + 4 + 2 = 7. 4. Final Sum: 75.

Q: What is the core learning objective for 2-digit addition with regrouping?

Fluently add two two-digit numbers with regrouping (carrying), decomposing 10 ones into 1 ten placed in the tens column carry box. This directly aligns with Common Core Standard CCSS.MATH.CONTENT.2.NBT.B.5.

Q: What is the most common mistake students make with 2-digit addition with regrouping?

A frequent pitfall is: "Writing the entire 2-digit sum under the ones column". Why students stumble: Writing 15 under the ones column instead of carrying the 1 ten (e.g. 48 + 27 = 615). How to fix it: Remember: Each column can hold ONLY ONE digit (0–9). If the sum is 10 or more, carry the ten! (Example: In 8 + 7 = 15, write 5 and carry 1 to the box.)

Q: What is included in the 4 differentiated worksheet sets?

Set A covers standard core practice (Vertical column addition with carry box scaffold where ones sum to 10–18 and total sum < 100.). Set B is an Anti-Cheat version with alternate numbers to prevent copying. Set C features challenging problems, and Set D is a timed sprint.

Q: Are these 2-digit addition with regrouping worksheets free to print with answer keys?

Yes! Every single worksheet on PanMaths is 100% free with no sign-up needed. Each sheet includes a dedicated Answer Key on Page 2 with step-by-step intermediate evaluation lines for 1-minute grading.

Practice 2-digit addition with regrouping (Grade 2) with free printable PDF worksheets. 4 pre-packaged classroom sets with 100% verified step-by-step answer keys, plus an unlimited live customizer for teachers and homeschoolers.

📐Aligned to Common Core (CCSS.MATH.CONTENT.2.NBT.B.5)·5-10 min per sheet

Include Key in PrintShow Worked Steps

Count:

PanMaths.com2-Digit Addition With Regrouping Worksheets • Set A (Standard)

Name: __________________________

Date: _____________ Period: ____

Score: _____ / 10

+17

+13

+44

+56

+19

+47

+19

+38

+67

+28

PanMaths.com • Free Printable Math WorksheetsPage 1 of 2

PanMaths.comAnswer Key & Worked Solutions • Set A (Standard)

Answer Key

Total Problems: 10

+17

1. Add Ones: 4 + 7 = 11 ➔ Write 1, Carry 1 to Tens

2. Add Tens: 1 (carry) + 6 + 1 = 8 ➔ Write 8

+13

1. Add Ones: 7 + 3 = 10 ➔ Write 0, Carry 1 to Tens

2. Add Tens: 1 (carry) + 6 + 1 = 8 ➔ Write 8

+44

1. Add Ones: 9 + 4 = 13 ➔ Write 3, Carry 1 to Tens

2. Add Tens: 1 (carry) + 4 + 4 = 9 ➔ Write 9

+56

1. Add Ones: 4 + 6 = 10 ➔ Write 0, Carry 1 to Tens

2. Add Tens: 1 (carry) + 1 + 5 = 7 ➔ Write 7

+19

1. Add Ones: 3 + 9 = 12 ➔ Write 2, Carry 1 to Tens

2. Add Tens: 1 (carry) + 4 + 1 = 6 ➔ Write 6

+47

1. Add Ones: 4 + 7 = 11 ➔ Write 1, Carry 1 to Tens

2. Add Tens: 1 (carry) + 1 + 4 = 6 ➔ Write 6

+19

1. Add Ones: 8 + 9 = 17 ➔ Write 7, Carry 1 to Tens

2. Add Tens: 1 (carry) + 4 + 1 = 6 ➔ Write 6

+38

1. Add Ones: 3 + 8 = 11 ➔ Write 1, Carry 1 to Tens

2. Add Tens: 1 (carry) + 5 + 3 = 9 ➔ Write 9

+67

1. Add Ones: 7 + 7 = 14 ➔ Write 4, Carry 1 to Tens

2. Add Tens: 1 (carry) + 1 + 6 = 8 ➔ Write 8

+28

1. Add Ones: 2 + 8 = 10 ➔ Write 0, Carry 1 to Tens

2. Add Tens: 1 (carry) + 5 + 2 = 8 ➔ Write 8

PanMaths.com • Answer Key & SolutionsPage 2 of 2

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Worksheet Info

Categorygrade-2

Grade LevelGrade 2

DifficultyEasy, Medium, Hard, Sprint

Time5-10 min

CCSS CodeCCSS.MATH.CONTENT.2.NBT.B.5

Skills Practiced

✓ 2-Digit Addition With Regrouping

Key Strategies

📦 The Carry Box Strategy: When ones sum to 10 or more (e.g. 8 + 7 = 15), write the 5 in the ones column below the line and carry the 1 ten into the carry box above the tens column.
➕ Never Forget the Carried Ten: When adding the tens column, always add the carried 1 first: 1 (carried) + 4 + 2 = 7 tens.
🔟 10 Ones = 1 Ten: Visualize ten 1-cubes snapping together to form one 10-rod. Regrouping is simply moving full sets of ten to their proper place value column.

🎮 Interactive Warm-Up

Addition Mastery

Warm up with 60 seconds of rapid mental math practice before printing!

Play Speed Game Free →

Related Worksheets

📄 Base-10 Blocks to 1,000View →📄 Expanded Form 3-Digit NumbersView →📄 Comparing 3-Digit NumbersView →📄 Skip Counting by 3s and 4sView →

📜 Standard: CCSS.MATH.CONTENT.2.NBT.B.5🔗 CCSS.MATH.CONTENT.2.NBT.B.6🔗 CCSS.MATH.CONTENT.2.NBT.B.7

Mastering 2-Digit Addition With Regrouping: Core Concepts & Mental Models

Regrouping (carrying) occurs when the sum of digits in the ones place is 10 or greater. Because a single column can only hold one digit (0–9), students regroup 10 ones into 1 ten, recording it inside the dedicated carry box above the tens column.

Worked Example & SolutionTeacher Step-by-Step Method

📝 Problem: Calculate vertically: 48 + 27

Worked Solution: 1. Add the ones: 8 + 7 = 15. 2. Regroup: Write 5 below, write 1 in the carry box above the tens. 3. Add the tens: 1 (carried) + 4 + 2 = 7. 4. Final Sum: 75.

💡 Essential Strategies for 2-Digit Addition With Regrouping

📦 The Carry Box Strategy

When ones sum to 10 or more (e.g. 8 + 7 = 15), write the 5 in the ones column below the line and carry the 1 ten into the carry box above the tens column.

➕ Never Forget the Carried Ten

When adding the tens column, always add the carried 1 first: 1 (carried) + 4 + 2 = 7 tens.

🔟 10 Ones = 1 Ten

Visualize ten 1-cubes snapping together to form one 10-rod. Regrouping is simply moving full sets of ten to their proper place value column.

⚠️ Common Mistakes & Teacher Fixes

⚠️Writing the entire 2-digit sum under the ones column

Why students stumble: Writing 15 under the ones column instead of carrying the 1 ten (e.g. 48 + 27 = 615).

Teacher Fix: Remember: Each column can hold ONLY ONE digit (0–9). If the sum is 10 or more, carry the ten!

Example: In 8 + 7 = 15, write 5 and carry 1 to the box.

⚠️Forgetting to add the carried 1 in the tens column

Why students stumble: Writing the carried 1 in the box but adding only 4 + 2 = 6 instead of 1 + 4 + 2 = 7.

Teacher Fix: Always start with the carry box: 1 + 4 + 2 = 7!

Example: 48 + 27 = 75, NOT 65.

📖 Key Mathematical Vocabulary

Regrouping

Rearranging numbers into groups of 10 (trading 10 ones for 1 ten, or 10 tens for 1 hundred).

Carrying

Writing the regrouped ten in the small carry box above the tens column to be added with other tens.

Carry Box

A scaffolded box above the tens column that guides 2nd graders to record and remember carried tens.

Base-Ten Block Model

Using rods (tens) and units (ones) to visually see when 10 units combine into 1 rod.

🎯 4 Differentiated Classroom Sets Included

Standard 10Version A

Set A: Core Regrouping with Carry Boxes (10 Problems)

Vertical column addition with carry box scaffold where ones sum to 10–18 and total sum < 100.

Anti-CheatVersion B

Set B: Alternate Numbers (10 Problems)

Identical regrouping structure with alternate numbers to prevent desk-copying.

ChallengingVersion C

Set C: Sums Over 100 (8 Problems)

Addends producing sums over 100 (e.g. 68 + 57 = 125) introducing hundreds column extension.

Speed SprintVersion D

Set D: 3-Minute Regrouping Sprint (15 Problems)

15 rapid regrouping problems to solidify carry-over automaticity under gentle time limits.

❓ Frequently Asked Questions

How do you solve a 2-digit addition with regrouping problem step by step?

Here is a worked example: "Calculate vertically: 48 + 27". Solution: 1. Add the ones: 8 + 7 = 15. 2. Regroup: Write 5 below, write 1 in the carry box above the tens. 3. Add the tens: 1 (carried) + 4 + 2 = 7. 4. Final Sum: 75.

What is the core learning objective for 2-digit addition with regrouping?

Fluently add two two-digit numbers with regrouping (carrying), decomposing 10 ones into 1 ten placed in the tens column carry box. This directly aligns with Common Core Standard CCSS.MATH.CONTENT.2.NBT.B.5.

What is the most common mistake students make with 2-digit addition with regrouping?

A frequent pitfall is: "Writing the entire 2-digit sum under the ones column". Why students stumble: Writing 15 under the ones column instead of carrying the 1 ten (e.g. 48 + 27 = 615). How to fix it: Remember: Each column can hold ONLY ONE digit (0–9). If the sum is 10 or more, carry the ten! (Example: In 8 + 7 = 15, write 5 and carry 1 to the box.)

What is included in the 4 differentiated worksheet sets?

Set A covers standard core practice (Vertical column addition with carry box scaffold where ones sum to 10–18 and total sum < 100.). Set B is an Anti-Cheat version with alternate numbers to prevent copying. Set C features challenging problems, and Set D is a timed sprint.

Are these 2-digit addition with regrouping worksheets free to print with answer keys?

Yes! Every single worksheet on PanMaths is 100% free with no sign-up needed. Each sheet includes a dedicated Answer Key on Page 2 with step-by-step intermediate evaluation lines for 1-minute grading.