用英文数字填空
1. four + eight = ___________
2. seven + eight= ___________
3. thirteen + seven = ___________
4. fourteen + sixteen = ___________
5. seventy - fourteen = ___________
6. eighty - sixteen = ___________
7. sixty - thirteen = ___________
8. eighty - forty= ___________
9. forty-eight - twelve= ___________
10. ninety + five = ___________