(800.565-565) :1000

To solve the expression (800.565 - 565) divided by 1000, first subtract 565 from 800.565:

800.565 - 565 = 235.565

Then, divide the result by 1000:

235.565 ÷ 1000 = 0.235565

So, (800.565 - 565) divided by 1000 is equal to 0.235565.