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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


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