Let’s solve each addition problem step by step. Remember: we are adding 3-digit and 2-digit numbers
without regrouping, which means in every column (ones, tens, hundreds), the sum will be less than 10 — so no carrying over!
We’ll go one problem at a time.
---
Problem 1a)
534
+ 45
------
Start from right to left:
- Ones place: 4 + 5 =
9
- Tens place: 3 + 4 =
7
- Hundreds place: 5 + 0 =
5 (since 45 has no hundreds digit)
→ Answer:
579
---
Problem 1b)
213
+ 62
------
- Ones: 3 + 2 =
5
- Tens: 1 + 6 =
7
- Hundreds: 2 + 0 =
2
→ Answer:
275
---
Problem 1c)
304
+ 84
------
- Ones: 4 + 4 =
8
- Tens: 0 + 8 =
8
- Hundreds: 3 + 0 =
3
→ Answer:
388
---
Problem 1d)
672
+ 16
------
- Ones: 2 + 6 =
8
- Tens: 7 + 1 =
8
- Hundreds: 6 + 0 =
6
→ Answer:
688
---
Problem 1e)
130
+ 56
------
- Ones: 0 + 6 =
6
- Tens: 3 + 5 =
8
- Hundreds: 1 + 0 =
1
→ Answer:
186
---
Problem 1f)
802
+ 92
------
- Ones: 2 + 2 =
4
- Tens: 0 + 9 =
9
- Hundreds: 8 + 0 =
8
→ Answer:
894
---
Problem 1g)
529
+ 50
------
- Ones: 9 + 0 =
9
- Tens: 2 + 5 =
7
- Hundreds: 5 + 0 =
5
→ Answer:
579
---
Problem 1h)
281
+ 17
------
- Ones: 1 + 7 =
8
- Tens: 8 + 1 =
9
- Hundreds: 2 + 0 =
2
→ Answer:
298
---
Problem 1i)
552
+ 36
------
- Ones: 2 + 6 =
8
- Tens: 5 + 3 =
8
- Hundreds: 5 + 0 =
5
→ Answer:
588
---
Problem 1j)
607
+ 72
------
- Ones: 7 + 2 =
9
- Tens: 0 + 7 =
7
- Hundreds: 6 + 0 =
6
→ Answer:
679
---
Problem 1k)
634
+ 51
------
- Ones: 4 + 1 =
5
- Tens: 3 + 5 =
8
- Hundreds: 6 + 0 =
6
→ Answer:
685
---
Final Answer:
1a) 579
1b) 275
1c) 388
1d) 688
1e) 186
1f) 894
1g) 579
1h) 298
1i) 588
1j) 679
1k) 685
Parent Tip: Review the logic above to help your child master the concept of addition and subtraction worksheet with and without regrouping.
