Adding Multiple Addends (Within 20) - Group or reorder the addends

Sep 30, 2026

Upload by Hazel

Adding Multiple Addends (Within 20) focuses on regrouping addends to simplify addition by finding sums that stay within 20. Learners are prompted to group or reorder numbers, look for a ten, and compute each result while explaining the strategy used. Worksheets include multiple problems presented in grouped-addend form with provided answer keys, supporting practice of place-value reasoning and efficient mental addition.

LanguageEnglish

CategoryExam

FormatPDF

Pages30

Reading Time1 h 16 min

AccessFree to download

Adding Multiple Addends (Within 20)

Group or reorder the addends

Answers and answer key

Adding Multiple Addends (Within 20) Name: Group or reorder the addends to make adding easier. Look for a ten. Find each sum and explain your strategy. 1) 5) 9) 13) 17) 8 2 + 9 6 3 + 7 2 5 + 1 7 1 + 7 1 7 + 8 2) 6) 10) 14) 18) 5 1 + 8 5 9 + 5 1 2 + 2 4 2 + 3 3 6 + 5 3) 7) 11) 15) 19) 8 3 + 1 6 5 + 5 5 3 + 7 9 2 + 7 4 1 + 5 4) 8) 12) 16) 20) 5 4 + 7 3 9 + 1 9 8 + 3 8 4 + 8 9 2 + 2 Answers 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. Math [www.CommonCoreSheets.com](www.CommonCoreSheets.com) 1 1-10 11-20 95 45 90 40 85 35 80 30 75 25 70 20 65 15 60 10 55 5 50 0 Adding Multiple Addends (Within 20) Name: Answer Key | Group or reorder the addends to make adding easier. Look for a ten. Find each sum and explain your strategy. | | | | | | | | Answers
1. 19 2. 14 3. 12 4. 16 5. 16 6. 19 7. 16 8. 13 9. 8 10. 5 11. 15 12. 20 13. 15 14. 9 15. 18 16. 20 17. 16 18. 14 19. 10
20. 13 | | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1)
5)
9)
13)
17) | 82
+ 9
1 9
63
+ 7
1 6
25
+ 1
8
71
+ 7
1 5
17
+ 8
1 6 | 2)
6)
10)
14)
18) | 51
+ 8
1 4
59
+ 5
1 9
12
+ 2
5
42
+ 3
9
36
+ 5
1 4 | 3)
7)
11)
15)
19) | 83
+ 1
1 2
65
+ 5
1 6
53
+ 7
1 5
92
+ 7
1 8
41
+ 5
1 0 | 4)
8)
12)
16)
20) | 54
+ 7
1 6
39
+ 1
1 3
98
+ 3
2 0
84
+ 8
2 0
92
+ 2
1 3 | | Math [www.CommonCoreSheets.com](www.CommonCoreSheets.com) 1 1-10 11-20 95 45 90 40 85 35 80 30 75 25 70 20 65 15 60 10 55 5 50 0 Adding Multiple Addends (Within 20) Name: | Group or reorder the addends to make adding easier. Look for a ten. Find each sum and explain your strategy. | Answers
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12. | | --- | --- | |
16 5 16 13
12 16 8 20
15 19 19 14 | | | 1) 8 2) 5 3) 8 4) 5
2 1 3 4
+ 9 + 8 + 1 + 7
5) 6 6) 5 7) 6 8) 3
3 9 5 9
+ 7 + 5 + 5 + 1
9) 2 10) 1 11) 5 12) 9
5 2 3 8
+ 1 + 2 + 7 + 3 | | Math Modified [www.CommonCoreSheets.com](www.CommonCoreSheets.com) 1 1-10 11-12 | 92 | 83 | 75 | 67 | 58 | 50 | 42 | 33 | 25 | 17 | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 8 | 0 | | | | | | | | | Adding Multiple Addends (Within 20) Name: Group or reorder the addends to make adding easier. Look for a ten. Find each sum and explain your strategy. 1) 5) 9) 13) 17) 9 4 + 1 6 1 + 5 6 2 + 4 2 6 + 3 7 7 + 2 2) 6) 10) 14) 18) 3 4 + 7 3 3 + 5 3 1 + 3 8 3 + 9 6 6 + 4 3) 7) 11) 15) 19) 1 7 + 7 1 1 + 5 7 1 + 4 5 1 + 3 4 8 + 4 4) 8) 12) 16) 20) 2 8 + 3 7 1 + 9 2 6 + 8 3 6 + 1 3 6 + 5 Answers 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. Math [www.CommonCoreSheets.com](www.CommonCoreSheets.com) 2 1-10 11-20 95 45 90 40 85 35 80 30 75 25 70 20 65 15 60 10 55 5 50 0 Adding Multiple Addends (Within 20) Name: Answer Key | Group or reorder the addends to make adding easier. Look for a ten. Find each sum and explain your strategy. | | | | | | | | Answers
1. 14 2. 14 3. 15 4. 13 5. 12 6. 11 7. 7 8. 17 9. 12 10. 7 11. 12 12. 16 13. 11 14. 20 15. 9 16. 10 17. 16 18. 16 19. 16
20. 14 | | --- | --- | --- | ---

FAQs

What does the worksheet ask students to do in Adding Multiple Addends (Within 20)?

Students group or reorder the addends to make adding easier, then find each sum while explaining their strategy.

What strategy is emphasized for these problems?

The instructions highlight looking for a ten to simplify the addition process.

Are answer keys provided for the problems?

Yes. The document includes an “Answers” section and an “Answer Key” listing the sums for each numbered problem.

Sep 30, 2026

Upload by Hazel