Identify Integer and Decimal: Identify the integer and decimal part of the decimal number 6.4. Decimal number: 6.4Integer part: 6Decimal part: 0.4
Determine Rounding Direction: Determine if the decimal part is less than or equal to0.5 to decide whether to round down or if it is greater than 0.5 to decide whether to round up.The decimal part 0.4 is less than 0.5, so we round down.
Round to Nearest Whole Number: Round 6.4 to the nearest whole number.Since the decimal part is less than 0.5, we round down to the nearest whole number, which is 6.