Question

12,354,897 place each # in place value 245897just need to make sure I am right ...okay 2 =1million,4=1thousand,5=10 thousand,8=100,9=107=ones

Answer 1

From the looks of things, you've certainly
mastered your place values ! Those are
all correct.

You did leave out the "10 millions place".
That's the ' 1 ' at the very beginning.

Oh ! You also left out the ' 3 '.
I'll let you name that one, because
I can see that you understand this stuff.