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General rules to add decimal numbers:
Step 1: Line up the decimal numbers one by one.
Step 2: Equalize the number of decimal places by adding zeros at the rightmost side of the decimal number.
Step 3: Start adding from the rightmost digit of the decimal number as the usual addition.
Step 4: Add both decimal part and whole number part.
Step 5: Finally, put a decimal point in the answer in the same place as the numbers above it.
Example:
Add 456.23 and 56.026.
Here, to equalize the decimal places, add zero at the end of 456.23.
Therefore, the addition of 456.23 and 56.026 is 512.256.
Example:
Find the sum of 23.592, 34.467 and 56.83.
Here, to equalize the decimal places, add zero at the end of 56.83.
Therefore, the sum of 23.592, 34.467 and 56.83 is 114.889.