Math Challenge (See Details)

9+2

11

9+3

12

9+4

13

9+5

14

9+6

15

9+7

16

9+8

17

8+3

11

8+4

12

8+5

13

8+6

14

8+7

15

7+4

11

7+5

12

7+6

13

6+3

9