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Regrouping Addition Quest • Lesson • Lenny.com

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Regrouping Addition Quest

A comprehensive multi-digit addition practice packet and complete teacher answer key focusing on place value regrouping across 2-digit and 3-digit problems.

Regrouping Addition Quest

A comprehensive multi-digit addition practice packet and complete teacher answer key focusing on place value regrouping across 2-digit and 3-digit problems.

Regrouping Addition Packet

Addition Packet Page 1 of 5

2-Digit Addition: Regrouping Tens

Name:

Skill: Add ones, regroup 10 ones as 1 ten into the tens box.

Date:

! Regrouping Rule:

Step 1: Add ones. If 10 or more, write the ones below and regroup 1 ten into the tens box.

Step 2: Add all tens together, including the regrouped ten.

Model

T O

1

3 8

2 7

6 5

T O

4 8

2 7

T O

3 5

2 9

T O

5 6

1 8

T O

6 3

2 8

T O

2 9

4 4

T O

5 7

3 5

T O

1 9

6 8

T O

4 6

3 6

T O

3 8

4 5

T O

7 4

1 9

T O

5 2

3 9

T O

6 7

2 5

T O

3 9

4 7

T O

2 8

5 6

T O

4 9

3 8

Page 1 Score: / 15

Regrouping check: Did you add the tens box?

Addition Packet Page 2 of 5

2-Digit Addition: Fluency Practice

Name:

Directions: Add the ones first. Regroup to the tens box for each problem!

Date:

PRO TIP Always write the regrouped 1 right above the tens column before adding down!

T O

5 4

3 8

T O

4 7

2 6

T O

6 8

1 5

T O

3 9

4 8

T O

2 5

5 9

T O

7 3

1 8

T O

4 9

3 7

T O

5 8

2 4

T O

3 6

4 7

T O

6 5

2 9

T O

1 8

7 4

T O

4 3

3 9

T O

5 7

2 8

T O

3 4

4 9

T O

6 6

2 7

Page 2 Score: / 15

Fluency check: All regrouped numbers recorded?

Addition Packet Page 3 of 5

3-Digit Addition: Regrouping Tens

Name:

Skill: When tens add up to 10 or more, regroup 10 tens as 1 hundred!

Date:

! Regrouping in the Tens Column:

1. Add ones: \(4 + 1 = 5\).

2. Add tens: \(8 \text{ tens} + 7 \text{ tens} = 15 \text{ tens}\). Write 5 in the tens place and regroup 1 hundred into the hundreds box.

3. Add hundreds: \(1 + 3 + 2 = 6\) hundreds.

Model

H T O

1

3 8 4

2 7 1

6 5 5

H T O

3 8 2

2 7 4

H T O

4 6 1

3 9 2

H T O

2 9 3

4 5 1

H T O

5 7 4

1 8 3

H T O

6 8 5

2 4 1

H T O

3 5 2

4 9 3

H T O

1 9 4

6 8 2

H T O

5 8 1

3 6 4

H T O

4 7 3

2 8 5

H T O

3 6 2

4 8 5

H T O

2 9 0

5 4 7

H T O

6 7 4

1 5 3

Page 3 Score: / 12

Check: Did 10 tens regroup into 1 hundred?

Addition Packet Page 4 of 5

3-Digit Addition: Fluency Practice

Name:

Directions: Add starting from ones, regroup tens to hundreds, and double-check your work!

Date:

CHECK Look at the tens column: if the tens digits sum to 10 or more, write the regrouped 1 above hundreds!

H T O

5 6 3

2 9 1

H T O

4 8 4

3 7 2

H T O

2 7 5

4 6 3

H T O

6 9 1

1 8 4

H T O

3 8 6

4 5 2

H T O

1 9 2

5 7 4

H T O

4 7 3

3 8 1

H T O

3 5 7

2 9 0

H T O

5 8 2

2 6 4

H T O

4 9 5

2 4 3

H T O

1 8 4

6 7 5

H T O

3 7 1

4 8 6

Page 4 Score: / 12

Fluency check: Regrouped 1 hundred added to hundreds sum?

Addition Packet Page 5 of 5

Double Regrouping: Hundreds & Tens

Name:

Mastery Practice: Regroup ones into tens AND tens into hundreds!

Date:

★ Double Regrouping Steps:

Step 1 (Ones): \(8 + 6 = 14\). Write 4, regroup 1 ten into the tens box.

Step 2 (Tens): \(1 + 7 + 5 = 13 \text{ tens}\). Write 3, regroup 1 hundred into the hundreds box.

Step 3 (Hundreds): \(1 + 3 + 2 = 6\) hundreds. Sum = 634.

Model

H T O

1 1

3 7 8

2 5 6

6 3 4

H T O

4 7 8

2 6 5

H T O

3 8 9

4 5 7

H T O

5 6 4

2 7 8

H T O

2 9 7

3 8 6

H T O

4 8 5

3 6 8

H T O

1 7 6

5 8 9

H T O

3 6 8

4 7 5

H T O

6 5 9

1 8 4

H T O

4 9 6

2 7 8

H T O

3 7 5

4 8 9

H T O

5 8 7

2 6 8

H T O

2 9 8

5 7 6

Packet Final Score: / 12

Self-Rating: ⭐ Practicing ⭐⭐ Confident ⭐⭐⭐ Regrouping Star!

Regrouping Addition Key

Teacher Answer Key Page 1 of 5

2-Digit Addition: Regrouping Tens

Name:

ANSWER KEY

Target: Ones sum to 10 or more; regroup 1 ten to the tens place.

Date:

Teacher Reference

✓ Answer Key Verification:

Verify students record the regrouped 1 in the dashed box before calculating the tens column sum.

Model

T O

1

3 8

2 7

6 5

TO

1

48

+27

75

TO

1

35

+29

64

TO

1

56

+18

74

TO

1

63

+28

91

TO

1

29

+44

73

TO

1

57

+35

92

TO

1

19

+68

87

TO

1

46

+36

82

TO

1

38

+45

83

TO

1

74

+19

93

TO

1

52

+39

91

TO

1

67

+25

92

TO

1

39

+47

86

TO

1

28

+56

84

TO

1

49

+38

87

Target Mastery: 13-15 correct is Proficient; all regrouping boxes should contain 1.

Max: 15 Pts

Teacher Answer Key Page 2 of 5

2-Digit Addition: Fluency Practice

Name:

ANSWER KEY

Target: Complete sums with 10 ones regrouped as 1 ten into the tens place.

Date:

Teacher Reference

KEY All 15 items require regrouping 1 ten into the tens column. Check sums below.

TO

1

54

+38

92

TO

1

47

+26

73

TO

1

68

+15

83

TO

1

39

+48

87

TO

1

25

+59

84

TO

1

73

+18

91

TO

1

49

+37

86

TO

1

58

+24

82

TO

1

36

+47

83

TO

1

65

+29

94

TO

1

18

+74

92

TO

1

43

+39

82

TO

1

57

+28

85

TO

1

34

+49

83

TO

1

66

+27

93

Target Mastery: 13-15 correct is Proficient; check alignment of tens digits.

Max: 15 Pts

Teacher Answer Key Page 3 of 5

3-Digit Addition: Regrouping Tens

Name:

ANSWER KEY

Target: 10 tens regrouped as 1 hundred into the hundreds box.

Date:

Teacher Reference

✓ Key Concept: Regrouping Tens into Hundreds

When tens add to 10 or greater, write the tens digit below and record the regrouped 1 hundred in the box above hundreds.

Model

H T O

1

3 8 4

2 7 1

6 5 5

HTO

1

382

+274

656

HTO

1

461

+392

853

HTO

1

293

+451

744

HTO

1

574

+183

757

HTO

1

685

+241

926

HTO

1

352

+493

845

HTO

1

194

+682

876

HTO

1

581

+364

945

HTO

1

473

+285

758

HTO

1

362

+485

847

HTO

1

290

+547

837

HTO

1

674

+153

827

Target Mastery: 10-12 correct is Proficient; check regrouped hundreds digit.

Max: 12 Pts

Teacher Answer Key Page 4 of 5

3-Digit Addition: Fluency Practice

Name:

ANSWER KEY

Target: Fluency with regrouping tens to hundreds across 3-digit addends.

Date:

Teacher Reference

KEY Tens column adds to 10 or greater for every problem; regrouped 1 must be placed above hundreds.

HTO

1

563

+291

854

HTO

1

484

+372

856

HTO

1

275

+463

738

HTO

1

691

+184

875

HTO

1

386

+452

838

HTO

1

192

+574

766

HTO

1

473

+381

854

HTO

1

357

+290

647

HTO

1

582

+264

846

HTO

1

495

+243

738

HTO

1

184

+675

859

HTO

1

371

+486

857

Target Mastery: 10-12 correct is Proficient; check tens regrouping into hundreds.

Max: 12 Pts

Teacher Answer Key Page 5 of 5

Double Regrouping: Hundreds & Tens

Name:

ANSWER KEY

Target: Double regrouping (ones to tens AND tens to hundreds).

Date:

Teacher Reference

★ Double Regrouping Check:

Check that students write 1 in both the tens and hundreds boxes, and include the carried ten when adding tens!

Model

H T O

1 1

3 7 8

2 5 6

6 3 4

HTO

1 1

478

+265

743

HTO

1 1

389

+457

846

HTO

1 1

564

+278

842

HTO

1 1

297

+386

683

HTO

1 1

485

+368

853

HTO

1 1

176

+589

765

HTO

1 1

368

+475

843

HTO

1 1

659

+184

843

HTO

1 1

496

+278

774

HTO

1 1

375

+489

864

HTO

1 1

587

+268

855

HTO

1 1

298

+576

874

Mastery Benchmark: 10-12 correct: Mastered double regrouping; 8-9: Review tens place regrouping.

Max: 12 Pts

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