Let’s solve each decimal addition problem step by step. We’ll line up the decimals and add carefully, just like adding whole numbers — but making sure the decimal points stay in a straight column.
---
Problem 1: 13.4 + 44.4
Line them up:
```
13.4
+ 44.4
------
```
Add tenths: 4 + 4 = 8
Add ones: 3 + 4 = 7
Add tens: 1 + 4 = 5
→
57.8
---
Problem 2: 19.15 + 18.18
```
19.15
+ 18.18
-------
```
Hundredths: 5 + 8 = 13 → write 3, carry 1
Tenths: 1 + 1 + 1 (carry) = 3
Ones: 9 + 8 = 17 → write 7, carry 1
Tens: 1 + 1 + 1 (carry) = 3
→
37.33
---
Problem 3: 6.349 + 68.167
```
6.349
+ 68.167
--------
```
Thousandths: 9 + 7 = 16 → write 6, carry 1
Hundredths: 4 + 6 + 1 = 11 → write 1, carry 1
Tenths: 3 + 1 + 1 = 5
Ones: 6 + 8 = 14 → write 4, carry 1
Tens: 0 + 6 + 1 = 7
→
74.516
---
Problem 4: 16.1 + 32.4
```
16.1
+ 32.4
------
```
Tenths: 1 + 4 = 5
Ones: 6 + 2 = 8
Tens: 1 + 3 = 4
→
48.5
---
Problem 5: 39.15 + 44.16
```
39.15
+ 44.16
-------
```
Hundredths: 5 + 6 = 11 → write 1, carry 1
Tenths: 1 + 1 + 1 = 3
Ones: 9 + 4 = 13 → write 3, carry 1
Tens: 3 + 4 + 1 = 8
→
83.31
---
Problem 6: 37.696 + 39.167
```
37.696
+ 39.167
--------
```
Thousandths: 6 + 7 = 13 → write 3, carry 1
Hundredths: 9 + 6 + 1 = 16 → write 6, carry 1
Tenths: 6 + 1 + 1 = 8
Ones: 7 + 9 = 16 → write 6, carry 1
Tens: 3 + 3 + 1 = 7
→
76.863
---
Problem 7: 61.1 + 16.5
```
61.1
+ 16.5
------
```
Tenths: 1 + 5 = 6
Ones: 1 + 6 = 7
Tens: 6 + 1 = 7
→
77.6
---
Problem 8: 28.49 + 44.38
```
28.49
+ 44.38
-------
```
Hundredths: 9 + 8 = 17 → write 7, carry 1
Tenths: 4 + 3 + 1 = 8
Ones: 8 + 4 = 12 → write 2, carry 1
Tens: 2 + 4 + 1 = 7
→
72.87
---
Problem 9: 1.348 + 39.169
```
1.348
+ 39.169
--------
```
Thousandths: 8 + 9 = 17 → write 7, carry 1
Hundredths: 4 + 6 + 1 = 11 → write 1, carry 1
Tenths: 3 + 1 + 1 = 5
Ones: 1 + 9 = 10 → write 0, carry 1
Tens: 0 + 3 + 1 = 4
→
40.517
---
Problem 10: 13.9 + 50.0
```
13.9
+ 50.0
------
```
Tenths: 9 + 0 = 9
Ones: 3 + 0 = 3
Tens: 1 + 5 = 6
→
63.9
---
Problem 11: 28.47 + 39.15
```
28.47
+ 39.15
-------
```
Hundredths: 7 + 5 = 12 → write 2, carry 1
Tenths: 4 + 1 + 1 = 6
Ones: 8 + 9 = 17 → write 7, carry 1
Tens: 2 + 3 + 1 = 6
→
67.62
---
Problem 12: 37.688 + 48.169
```
37.688
+ 48.169
--------
```
Thousandths: 8 + 9 = 17 → write 7, carry 1
Hundredths: 8 + 6 + 1 = 15 → write 5, carry 1
Tenths: 6 + 1 + 1 = 8
Ones: 7 + 8 = 15 → write 5, carry 1
Tens: 3 + 4 + 1 = 8
→
85.857
---
Final Answer:
57.8, 37.33, 74.516, 48.5, 83.31, 76.863, 77.6, 72.87, 40.517, 63.9, 67.62, 85.857
Parent Tip: Review the logic above to help your child master the concept of for 5th grade decimal worksheet.
