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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

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