Arithmetic Homework Help : Decimal Addition

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Type the sum obtained on adding the following decimals.

1. 1.2
+ 4.8

Answer: 6.0

12 + 48 = 60
There is 1 decimal place in the numbers being added.
So the sum must have 1 decimal place.
Thus, 1.2 + 4.8 = 6.0

2. 42.3
+ 26.8

Answer: 69.1

423 + 268 = 691
There is 1 decimal place in the numbers being added.
So the sum must have 1 decimal place.
Thus, 42.3 + 26.8 = 69.1

3. 0.42
+ 0.25

Answer: 0.67

42 + 25 = 67
There are 2 decimal places in the numbers being added.
So the sum must have 2 decimal places.
Thus, 0.42 + 0.25 = 0.67

4. 4.29
+ 3.09

Answer: 7.38

429 + 309 = 738
There are 2 decimal places in the numbers being added.
So the sum must have 2 decimal places.
Thus, 4.29 + 3.09 = 7.38

5. 42.79
+ 40.62

Answer: 83.41

4279 + 4062 = 8341
There are 2 decimal places in the numbers being added.
So the sum must have 2 decimal places.
Thus, 42.79 + 40.62 = 83.41