Arithmetic Homework Help : Decimal Addition

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Type the sum obtained on adding the following decimals.

1. 2.7
+ 3.9
Answer: 6.6

27 + 39 = 66
There is 1 decimal place in the numbers being added.
So the sum must have 1 decimal place.
Thus, 2.7 + 3.9 = 6.6

2. 12.1
+ 45.1
Answer: 57.2

121 + 451 = 572
There is 1 decimal place in the numbers being added.
So the sum must have 1 decimal place.
Thus, 12.1 + 45.1 = 57.2

3. 0.24
+ 0.36
Answer: 0.6

24 + 36 = 60
There are 2 decimal places in the numbers being added.
So the sum must have 2 decimal places.
Thus, 0.24 + 0.36 = 0.6

4. 4.04
+ 4.72
Answer: 8.76

404 + 472 = 876
There are 2 decimal places in the numbers being added.
So the sum must have 2 decimal places.
Thus, 4.04 + 4.72 = 8.76

5. 21.59
+ 48.79
Answer: 70.38

2159 + 4879 = 7038
There are 2 decimal places in the numbers being added.
So the sum must have 2 decimal places.
Thus, 21.59 + 48.79 = 70.38