"What is 0.557 rounded to 2 decimal places?" is the same as asking, "What is 0.557 rounded to two decimal points?" or "How to round 0.557 to two decimal places."
The main point is that you want to round 0.557 to two digits or places after the decimal point. Thus, we want to eliminate the last digit in 0.557.
To eliminate the last digit in 0.557, we use the following Two Decimal Places Rules to get the answer:
Two Decimal Places Rule #1: If the last digit in 0.557 is less than 5, then remove the last digit.
Two Decimal Places Rule #2: If the last digit in 0.557 is 5 or more and the second to the last digit in 0.557 is less than 9, then remove the last digit and add 1 to the second to the last digit.
Two Decimal Places Rule #3: If the last digit in 0.557 is 5 or more and the second to the last digit in 0.557 is 9, and the third to the last digit is less than 9, then remove the last digit, make the second to last digit 0, and add 1 to the third to the last digit.
Two Decimal Places Rule #4: If the last digit in 0.557 is 5 or more and the second to the last digit is 9, and the third to the last digit is 9, then add 1 to the number on the left side of the decimal point and make the right side of the decimal point 00.
When rounding 0.557 to two decimal places we use Two Decimal Places Rule #2. Therefore, the answer to "What is 0.557 rounded to 2 decimal places?" is:
0.56
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