Let's solve each problem step by step, starting with
Addition with Regrouping, followed by
Subtraction with Regrouping.
---
🔹 Addition with Regrouping
We’ll add the numbers column by column (ones first, then tens), carrying over when needed.
1.
17 + 13
- Ones: 7 + 3 = 10 → write down 0, carry over 1
- Tens: 1 + 1 + 1 (carry) = 3
-
Answer: 30
2.
15 + 15
- Ones: 5 + 5 = 10 → write down 0, carry over 1
- Tens: 1 + 1 + 1 = 3
-
Answer: 30
3.
24 + 18
- Ones: 4 + 8 = 12 → write down 2, carry over 1
- Tens: 2 + 1 + 1 = 4
-
Answer: 42
4.
26 + 14
- Ones: 6 + 4 = 10 → write down 0, carry over 1
- Tens: 2 + 1 + 1 = 4
-
Answer: 40
5.
22 + 19
- Ones: 2 + 9 = 11 → write down 1, carry over 1
- Tens: 2 + 1 + 1 = 4
-
Answer: 41
6.
38 + 16
- Ones: 8 + 6 = 14 → write down 4, carry over 1
- Tens: 3 + 1 + 1 = 5
-
Answer: 54
7.
37 + 25
- Ones: 7 + 5 = 12 → write down 2, carry over 1
- Tens: 3 + 2 + 1 = 6
-
Answer: 62
8.
59 + 31
- Ones: 9 + 1 = 10 → write down 0, carry over 1
- Tens: 5 + 3 + 1 = 9
-
Answer: 90
---
🔹 Subtraction with Regrouping
We subtract column by column, borrowing from the tens place if needed.
1.
26 - 18
- Ones: 6 < 8 → borrow 1 from tens
- 16 - 8 = 8
- Tens: 2 becomes 1 after borrowing → 1 - 1 = 0
-
Answer: 8
2.
31 - 12
- Ones: 1 < 2 → borrow from tens
- 11 - 2 = 9
- Tens: 3 becomes 2 → 2 - 1 = 1
-
Answer: 19
3.
42 - 16
- Ones: 2 < 6 → borrow from tens
- 12 - 6 = 6
- Tens: 4 becomes 3 → 3 - 1 = 2
-
Answer: 26
4.
45 - 19
- Ones: 5 < 9 → borrow from tens
- 15 - 9 = 6
- Tens: 4 becomes 3 → 3 - 1 = 2
-
Answer: 26
5.
33 - 25
- Ones: 3 < 5 → borrow from tens
- 13 - 5 = 8
- Tens: 3 becomes 2 → 2 - 2 = 0
-
Answer: 8
6.
47 - 19
- Ones: 7 < 9 → borrow from tens
- 17 - 9 = 8
- Tens: 4 becomes 3 → 3 - 1 = 2
-
Answer: 28
7.
40 - 31
- Ones: 0 < 1 → borrow from tens
- 10 - 1 = 9
- Tens: 4 becomes 3 → 3 - 3 = 0
-
Answer: 9
8.
50 - 24
- Ones: 0 < 4 → borrow from tens
- 10 - 4 = 6
- Tens: 5 becomes 4 → 4 - 2 = 2
-
Answer: 26
---
✔ Final Answers:
####
Addition with Regrouping
1. 17 + 13 =
30
2. 15 + 15 =
30
3. 24 + 18 =
42
4. 26 + 14 =
40
5. 22 + 19 =
41
6. 38 + 16 =
54
7. 37 + 25 =
62
8. 59 + 31 =
90
####
Subtraction with Regrouping
1. 26 - 18 =
8
2. 31 - 12 =
19
3. 42 - 16 =
26
4. 45 - 19 =
26
5. 33 - 25 =
8
6. 47 - 19 =
28
7. 40 - 31 =
9
8. 50 - 24 =
26
---
Let me know if you'd like a printable version or visual explanations!
Parent Tip: Review the logic above to help your child master the concept of two digit addition with regrouping worksheets.
