7birds are on a fence, half of them fly away, then 2 come back. how many birds are left on the fence?

5

Step-by-step explanation:

half of 7 is 3.5 so we round to 4 because we can't have half a bird.

and 2 come back so

7-4+2=5

7. d. 64

8. i. 32

9. c. 125

10. j. none of the above

11. d. 81

12. i. 216

13. e. none of the above

14. g. 240

15. e. none of the above

16. g. 32

17.   e. none of the above