Arithmetic Homework Help : Decimal Addition

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Type the sum obtained on adding the following decimals.

1. 1.9
+ 4.5

Answer: 6.4

19 + 45 = 64
There is 1 decimal place in the numbers being added.
So the sum must have 1 decimal place.
Thus, 1.9 + 4.5 = 6.4

2. 43.9
+ 28.2

Answer: 72.1

439 + 282 = 721
There is 1 decimal place in the numbers being added.
So the sum must have 1 decimal place.
Thus, 43.9 + 28.2 = 72.1

3. 0.49
+ 0.31

Answer: 0.8

49 + 31 = 80
There are 2 decimal places in the numbers being added.
So the sum must have 2 decimal places.
Thus, 0.49 + 0.31 = 0.8

4. 4.88
+ 1.19

Answer: 6.07

488 + 119 = 607
There are 2 decimal places in the numbers being added.
So the sum must have 2 decimal places.
Thus, 4.88 + 1.19 = 6.07

5. 13.17
+ 45.08

Answer: 58.25

1317 + 4508 = 5825
There are 2 decimal places in the numbers being added.
So the sum must have 2 decimal places.
Thus, 13.17 + 45.08 = 58.25