Arithmetic Homework Help : Decimal Addition

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Type the sum obtained on adding the following decimals.

1. 2.1
+ 4.1

Answer: 6.2

21 + 41 = 62
There is 1 decimal place in the numbers being added.
So the sum must have 1 decimal place.
Thus, 2.1 + 4.1 = 6.2

2. 20.2
+ 23.1

Answer: 43.3

202 + 231 = 433
There is 1 decimal place in the numbers being added.
So the sum must have 1 decimal place.
Thus, 20.2 + 23.1 = 43.3

3. 0.39
+ 0.24

Answer: 0.63

39 + 24 = 63
There are 2 decimal places in the numbers being added.
So the sum must have 2 decimal places.
Thus, 0.39 + 0.24 = 0.63

4. 2.59
+ 1.36

Answer: 3.95

259 + 136 = 395
There are 2 decimal places in the numbers being added.
So the sum must have 2 decimal places.
Thus, 2.59 + 1.36 = 3.95

5. 48.19
+ 20.71

Answer: 68.90

4819 + 2071 = 6890
There are 2 decimal places in the numbers being added.
So the sum must have 2 decimal places.
Thus, 48.19 + 20.71 = 68.90