Sure! Let’s solve each decimal addition and subtraction problem step by step. The key is to
line up the decimal points and perform the operation as you would with whole numbers, then place the decimal point in the answer directly below the others.
---
Left Column:
1.
800.54 + 90.52
```
800.54
+ 90.52
--------
891.06
```
✔ Answer: 891.06
---
2.
94.9 – 41.871
Rewrite 94.9 as 94.900 to match decimal places:
```
94.900
- 41.871
--------
53.029
```
✔ Answer: 53.029
---
3.
803.309 – 133.36
Rewrite 133.36 as 133.360:
```
803.309
- 133.360
--------
669.949
```
✔ Answer: 669.949
---
4.
489.08 – 4.2
Rewrite 4.2 as 4.20:
```
489.08
- 4.20
--------
484.88
```
✔ Answer: 484.88
---
5.
384.94 + 17.348
Rewrite 384.94 as 384.940:
```
384.940
+ 17.348
--------
402.288
```
✔ Answer: 402.288
---
6.
67.1 – 1.19
Rewrite 67.1 as 67.10:
```
67.10
- 1.19
--------
65.91
```
✔ Answer: 65.91
---
7.
686.4 – 199.61
Rewrite 686.4 as 686.40:
```
686.40
- 199.61
--------
486.79
```
✔ Answer: 486.79
---
8.
75.715 + 30.5
Rewrite 30.5 as 30.500:
```
75.715
+ 30.500
--------
106.215
```
✔ Answer: 106.215
---
9.
3.7 + 1.5
```
3.7
+ 1.5
------
5.2
```
✔ Answer: 5.2
---
10.
875.75 + 26.64
```
875.75
+ 26.64
--------
902.39
```
✔ Answer: 902.39
---
Right Column:
11.
343.4 + 5.607
Rewrite 343.4 as 343.400:
```
343.400
+ 5.607
--------
349.007
```
✔ Answer: 349.007
---
12.
809.144 – 15.96
Rewrite 15.96 as 15.960:
```
809.144
- 15.960
--------
793.184
```
✔ Answer: 793.184
---
13.
767.3 – 24.9
Rewrite 767.3 as 767.30:
```
767.30
- 24.90
--------
742.40 → 742.4
```
✔ Answer: 742.4
---
14.
921.74 + 2.7
Rewrite 2.7 as 2.70:
```
921.74
+ 2.70
--------
924.44
```
✔ Answer: 924.44
---
15.
260.65 – 40.9
Rewrite 40.9 as 40.90:
```
260.65
- 40.90
--------
219.75
```
✔ Answer: 219.75
---
16.
35.438 – 17.2
Rewrite 17.2 as 17.200:
```
35.438
- 17.200
--------
18.238
```
✔ Answer: 18.238
---
17.
6.356 + 5.8
Rewrite 5.8 as 5.800:
```
6.356
+ 5.800
--------
12.156
```
✔ Answer: 12.156
---
18.
89.88 – 48.8
Rewrite 48.8 as 48.80:
```
89.88
- 48.80
--------
41.08
```
✔ Answer: 41.08
---
19.
64.32 + 21.63
```
64.32
+ 21.63
--------
85.95
```
✔ Answer: 85.95
---
20.
656.86 + 46.37
```
656.86
+ 46.37
--------
703.23
```
✔ Answer: 703.23
---
##
✔ Final Answers (Left to Right, Top to Bottom):
Left Column:
1. 891.06
2. 53.029
3. 669.949
4. 484.88
5. 402.288
6. 65.91
7. 486.79
8. 106.215
9. 5.2
10. 902.39
Right Column:
11. 349.007
12. 793.184
13. 742.4
14. 924.44
15. 219.75
16. 18.238
17. 12.156
18. 41.08
19. 85.95
20. 703.23
---
Let me know if you’d like these formatted into a printable answer sheet or need explanations for any specific problem!
Parent Tip: Review the logic above to help your child master the concept of addition and subtraction decimal worksheet pdf.
