What is 0.4536 in expanded form?

Please check:
0.4 + 0.05 + 0.003 + 0.0006

Right.

To express the number 0.4536 in expanded form, you need to break it down into the sum of its place values.

Let's break down the given decimal number:
0.4536

Starting from the leftmost digit, we have:
0.4 - This digit represents the tenths place value (0.4 is equal to 4/10)
0.05 - This digit represents the hundredths place value (0.05 is equal to 5/100 or 1/20)
0.003 - This digit represents the thousandths place value (0.003 is equal to 3/1000 or 1/333.33)
0.0006 - This digit represents the ten-thousandths place value (0.0006 is equal to 6/10000 or 1/1666.67)

So, in expanded form, 0.4536 is equal to:

0.4 + 0.05 + 0.003 + 0.0006

Therefore, the expanded form of 0.4536 is:
0.4 + 0.05 + 0.003 + 0.0006