Sure! Let’s solve each of the 15 vertical addition problems step by step. The goal is to find the sum (total) of each pair of numbers.
---
Problem 1:
```
33
+ 11
----
```
Solution:
33 + 11 =
44
---
Problem 2:
```
26
+ 26
----
```
Solution:
26 + 26 =
52
---
Problem 3:
```
57
+ 14
----
```
Solution:
57 + 14 → 50 + 10 = 60, 7 + 4 = 11 → 60 + 11 =
71
---
Problem 4:
```
17
+ 17
----
```
Solution:
17 + 17 =
34
---
Problem 5:
```
44
+ 6
----
```
Solution:
44 + 6 =
50
---
Problem 6:
```
33
+ 49
----
```
Solution:
33 + 49 → 30 + 40 = 70, 3 + 9 = 12 → 70 + 12 =
82
---
Problem 7:
```
42
+ 19
----
```
Solution:
42 + 19 → 40 + 10 = 50, 2 + 9 = 11 → 50 + 11 =
61
---
Problem 8:
```
33
+ 66
----
```
Solution:
33 + 66 =
99
---
Problem 9:
```
16
+ 84
----
```
Solution:
16 + 84 =
100
---
Problem 10:
```
43
+ 44
----
```
Solution:
43 + 44 =
87
---
Problem 11:
```
29
+ 33
----
```
Solution:
29 + 33 → 20 + 30 = 50, 9 + 3 = 12 → 50 + 12 =
62
---
Problem 12:
```
19
+ 35
----
```
Solution:
19 + 35 → 10 + 30 = 40, 9 + 5 = 14 → 40 + 14 =
54
---
Problem 13:
```
25
+ 78
----
```
Solution:
25 + 78 → 20 + 70 = 90, 5 + 8 = 13 → 90 + 13 =
103
---
Problem 14:
```
39
+ 12
----
```
Solution:
39 + 12 → 30 + 10 = 40, 9 + 2 = 11 → 40 + 11 =
51
---
Problem 15:
```
72
+ 18
----
```
Solution:
72 + 18 =
90
---
##
✔ Final Answers:
1)
44
2)
52
3)
71
4)
34
5)
50
6)
82
7)
61
8)
99
9)
100
10)
87
11)
62
12)
54
13)
103
14)
51
15)
90
---
## 📝 Explanation Summary:
- All problems are
two-digit + one-digit or two-digit + two-digit additions.
- We add
units (ones) first, then
tens.
- If the ones column adds up to 10 or more, we carry over 1 to the tens column (though in these problems, carrying is handled implicitly).
- For example, in problem 13: 25 + 78 → 5 + 8 = 13 → write down 3, carry 1 → 2 + 7 + 1 = 10 → total = 103.
You can now fill in the answers on your worksheet!
Let me know if you want a printable version or need help with subtraction too 😊
Parent Tip: Review the logic above to help your child master the concept of mathematics 4th grade worksheet.
