*expanded form: 6/10 + 3/100 + 2/1000 (that is not division those r fractions!)
*written: six hundred thirty-two thousandTHS
always put "ths" when it is after a decimal point.
For A B and C, you just plug in the given number
A

B

C

And for D, you set the equation to 26 and solve for n

I had to use x instead of n, but for D n=7. :)