Arithmetic Homework Help : Decimal Addition

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Type the sum obtained on adding the following decimals.

1. 3.1
+ 1.9

Answer: 5.0

31 + 19 = 50
There is 1 decimal place in the numbers being added.
So the sum must have 1 decimal place.
Thus, 3.1 + 1.9 = 5.0

2. 31.6
+ 19.4

Answer: 51.0

316 + 194 = 510
There is 1 decimal place in the numbers being added.
So the sum must have 1 decimal place.
Thus, 31.6 + 19.4 = 51.0

3. 0.39
+ 0.18

Answer: 0.57

39 + 18 = 57
There are 2 decimal places in the numbers being added.
So the sum must have 2 decimal places.
Thus, 0.39 + 0.18 = 0.57

4. 4.37
+ 4.83

Answer: 9.2

437 + 483 = 920
There are 2 decimal places in the numbers being added.
So the sum must have 2 decimal places.
Thus, 4.37 + 4.83 = 9.2

5. 27.38
+ 14.11

Answer: 41.49

2738 + 1411 = 4149
There are 2 decimal places in the numbers being added.
So the sum must have 2 decimal places.
Thus, 27.38 + 14.11 = 41.49