Place Value Chart: Writing 640 in Hundreds, Tens, and Units

To solve this problem, we need to write the number six hundred and forty using a place value chart:

• First, understand that the number six hundred and forty can be written as $640$.
• In a place value chart, each position represents a different power of ten. From the right, the first column is for units (ones), the second for tens, and the third for hundreds.

Let's fill in the chart:

• Step 1: Identify the hundreds place. The hundreds digit in the number $640$ is $6$. Place $6$ in the hundreds column.
• Step 2: Identify the tens place. The tens digit in the number $640$ is $4$. Place $4$ in the tens column.
• Step 3: Identify the units place. The units digit in the number $640$ is $0$. Place $0$ in the units column.

Therefore, the representation of the number six hundred and forty in the place value chart is:

$6,4,0$

Upon evaluating the choices provided, the correct choice that matches our obtained result is:

Choice 2: $6,4,0$