Sure! Let’s solve each decimal addition and subtraction problem step by step. The key is to
line up the decimal points and then perform the operation as you would with whole numbers, keeping the decimal point in the same column.
---
a. 800.54 + 90.52
```
800.54
+ 90.52
--------
891.06
```
✔ Answer: 891.06
---
b. 343.4 + 5.607
Align decimals (add trailing zeros if needed):
```
343.400
+ 5.607
---------
349.007
```
✔ Answer: 349.007
---
c. 94.9 - 41.871
Align decimals:
```
94.900
- 41.871
---------
53.029
```
✔ Answer: 53.029
---
d. 809.144 - 15.96
Align decimals:
```
809.144
- 15.960
---------
793.184
```
✔ Answer: 793.184
---
e. 803.309 - 133.36
Align decimals:
```
803.309
- 133.360
---------
669.949
```
✔ Answer: 669.949
---
f. 767.3 - 24.9
Align decimals:
```
767.3
- 24.9
-------
742.4
```
✔ Answer: 742.4
---
g. 489.08 - 4.2
Align decimals:
```
489.08
- 4.20
--------
484.88
```
✔ Answer: 484.88
---
h. 921.74 + 2.7
Align decimals:
```
921.74
+ 2.70
--------
924.44
```
✔ Answer: 924.44
---
i. 384.94 + 17.348
Align decimals:
```
384.940
+ 17.348
---------
402.288
```
✔ Answer: 402.288
---
j. 260.65 - 40.9
Align decimals:
```
260.65
- 40.90
--------
219.75
```
✔ Answer: 219.75
---
##
✔ Final Answers:
a.
891.06
b.
349.007
c.
53.029
d.
793.184
e.
669.949
f.
742.4
g.
484.88
h.
924.44
i.
402.288
j.
219.75
Let me know if you’d like to see any of these worked out visually or with more explanation!
Parent Tip: Review the logic above to help your child master the concept of adding and subtracting decimals worksheet.
