用英语表示下列数字。
1. 504 ___________ 2. 1312 ___________
3. 8385 ___________ 4. 916 ___________
5. 9800 ___________ 6. 3450 ___________
7. nine thousand + one hundred = ___________
8. four thousand one hundred and eighty-six + thirty –seven = ___________
9. six hundred and forty-five + twenty-four = ___________
10. two thousand + three hundred and seventy-six = ___________