Arithmetic Homework Help : Decimal Addition

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Type the sum obtained on adding the following decimals.

1. 3.7
+ 4.7

Answer: 8.4

37 + 47 = 84
There is 1 decimal place in the numbers being added.
So the sum must have 1 decimal place.
Thus, 3.7 + 4.7 = 8.4

2. 31.1
+ 32.6

Answer: 63.7

311 + 326 = 637
There is 1 decimal place in the numbers being added.
So the sum must have 1 decimal place.
Thus, 31.1 + 32.6 = 63.7

3. 0.12
+ 0.47

Answer: 0.59

12 + 47 = 59
There are 2 decimal places in the numbers being added.
So the sum must have 2 decimal places.
Thus, 0.12 + 0.47 = 0.59

4. 1.07
+ 3.43

Answer: 4.5

107 + 343 = 450
There are 2 decimal places in the numbers being added.
So the sum must have 2 decimal places.
Thus, 1.07 + 3.43 = 4.5

5. 19.09
+ 16.26

Answer: 35.35

1909 + 1626 = 3535
There are 2 decimal places in the numbers being added.
So the sum must have 2 decimal places.
Thus, 19.09 + 16.26 = 35.35