must be American - lol
I have to remove my shoes to count up to twenty. What's the problem?
I would buy something I know she wants and hand it to her and tell her that she has to hold it tightly with all of her fingers and count to a number that you KNOW she can count to without using her fingers. Let her know she can play with the item for ten minutes (or whatever time you deem appropriate) after she counts for you successfully to that number without using her fingers or anything else to count on. Then let her have her play time. Take the item back and periodically give her the opportunity to earn play time with it.
Good luck, I still do it sometimes!
stick her fingers up her arse and then yell suppertime
At 8 it's perfectly acceptable for her to be counting on her fingers. I teach first grade, which is 6 and 7, we promote them using their fingers as do the second/third grade teachers. It may slow them down, but it also helps make sure they do it correctly. If you are dead-set on her not using them, google 'Touch Math' which is basically where you touch each number that amount of times (touch 2 at 2 points to count, 3 at 3 points, etc.) I'm 25 and I do sometimes use my fingers to count. It's not a bad thing.
For math facts, there are flashcards online you can use or I bet her teacher can provide some. Doubles (1+1, 2+2, etc) are the easiest ones to remember and we teach them to use a double to find the answer. So if a problem is 7+6, they know that 6+6 is 12, so adding one more gives them 13. Flashcards can be helpful if she uses them often enough to get it to click. They make and sell different kinds of addition/subtraction flash cards, but honestly any of them will work as long as you use them and not too many at a time, you wouldn't want her getting overwhelmed to the point of frustration or giving up. Good luck :)
Don't, I'm 43 I still do it.
teach her to count her toes
Buy her a chinese abacus , That solved the issue with mine .
How old is she?
That's just how some people work and learn. Maybe she's a visual or kinesthetic learner. I don't think there's a problem if she gets the answer correct.