Arithmetic Homework Help : Decimal Addition

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Type the sum obtained on adding the following decimals.

1. 2.1
+ 2.3

Answer: 4.4

21 + 23 = 44
There is 1 decimal place in the numbers being added.
So the sum must have 1 decimal place.
Thus, 2.1 + 2.3 = 4.4

2. 47.8
+ 22.9

Answer: 70.7

478 + 229 = 707
There is 1 decimal place in the numbers being added.
So the sum must have 1 decimal place.
Thus, 47.8 + 22.9 = 70.7

3. 0.41
+ 0.12

Answer: 0.53

41 + 12 = 53
There are 2 decimal places in the numbers being added.
So the sum must have 2 decimal places.
Thus, 0.41 + 0.12 = 0.53

4. 4.17
+ 4.69

Answer: 8.86

417 + 469 = 886
There are 2 decimal places in the numbers being added.
So the sum must have 2 decimal places.
Thus, 4.17 + 4.69 = 8.86

5. 11.22
+ 24.18

Answer: 35.40

1122 + 2418 = 3540
There are 2 decimal places in the numbers being added.
So the sum must have 2 decimal places.
Thus, 11.22 + 24.18 = 35.40