123 as a decimal

Answer:

123 as a decimal is written as 123.0.

Explanation: 

Whole numbers can be easily expressed in decimal form by adding a decimal point followed by a zero. This does not change the value of the number but simply represents it in decimal notation.

Step 1: Identify the whole number. Here, it is 123.

Step 2: Add a decimal point to the whole number, making it 123.0.

Step 3: Recognize that the value remains the same, as the addition of ".0" does not alter the number.

This representation is useful in contexts where attention to decimal places is required, such as in financial calculations or measurements.

• Whole Number: A number without fractions; an integer.

• Decimal: A number expressed in the scale of tens, incorporating a decimal point to separate the integer part from the fractional part.

• Decimal Point: The dot used in a decimal number to separate the whole number from the fractional part.

• Fractional Part: The part of a decimal number that comes after the decimal point.

• Non-Terminating Decimal: A decimal that continues infinitely without repeating. (Note: This term is included to contrast with the concept of whole numbers as decimals.)