Answer :
Final answer:
To find the sum of -356.1 + 258.6, line up the decimals, add the digits in each column, and carry when necessary. The sum is -974.7.
Explanation:
To find the sum of -356.1 + 258.6, first line up the decimal points. Then add the digits in each column, carrying any necessary digits to the left. Starting from the rightmost column, we have:
- 3 5 6 .
+ 2 5 8 . 6
-----------------
-
Since the decimal point is aligned, we can add the digits:
- 3 5 6 .
+ 2 5 8 . 6
-----------------
- 9 7 4 . 7
Therefore, the sum of -356.1 + 258.6 is -974.7.
