Arithmetic Homework Help : Decimal Addition

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Type the sum obtained on adding the following decimals.

1. 1.1
+ 3.1

Answer: 4.2

11 + 31 = 42
There is 1 decimal place in the numbers being added.
So the sum must have 1 decimal place.
Thus, 1.1 + 3.1 = 4.2

2. 15.0
+ 30.1

Answer: 45.1

150 + 301 = 451
There is 1 decimal place in the numbers being added.
So the sum must have 1 decimal place.
Thus, 15.0 + 30.1 = 45.1

3. 0.19
+ 0.27

Answer: 0.46

19 + 27 = 46
There are 2 decimal places in the numbers being added.
So the sum must have 2 decimal places.
Thus, 0.19 + 0.27 = 0.46

4. 4.73
+ 3

Answer: 7.73

473 + 300 = 773
There are 2 decimal places in the numbers being added.
So the sum must have 2 decimal places.
Thus, 4.73 + 3 = 7.73

5. 37.12
+ 31.72

Answer: 68.84

3712 + 3172 = 6884
There are 2 decimal places in the numbers being added.
So the sum must have 2 decimal places.
Thus, 37.12 + 31.72 = 68.84