Grade 1: Missing addend - sums with 15
The number of all possible operations is equal to 32
Solve.

________ + 13 = 15

________ + 1 = 15

________ + 12 = 15

________ + 11 = 15

________ + 4 = 15

________ + 7 = 15

________ + 2 = 15

________ + 8 = 15

________ + 9 = 15

________ + 10 = 15

________ + 14 = 15

________ + 0 = 15

________ + 5 = 15

________ + 3 = 15

________ + 15 = 15

________ + 6 = 15

7 + ________ = 15

10 + ________ = 15

8 + ________ = 15

15 + ________ = 15

9 + ________ = 15

1 + ________ = 15

3 + ________ = 15

5 + ________ = 15

13 + ________ = 15

11 + ________ = 15

2 + ________ = 15

6 + ________ = 15

4 + ________ = 15

0 + ________ = 15

12 + ________ = 15

14 + ________ = 15




Grade 1: Missing addend - sums with 15
The number of all possible operations is equal to 32
The Answer.

2 + 13 = 15

14 + 1 = 15

3 + 12 = 15

4 + 11 = 15

11 + 4 = 15

8 + 7 = 15

13 + 2 = 15

7 + 8 = 15

6 + 9 = 15

5 + 10 = 15

1 + 14 = 15

15 + 0 = 15

10 + 5 = 15

12 + 3 = 15

0 + 15 = 15

9 + 6 = 15

7 + 8 = 15

10 + 5 = 15

8 + 7 = 15

15 + 0 = 15

9 + 6 = 15

1 + 14 = 15

3 + 12 = 15

5 + 10 = 15

13 + 2 = 15

11 + 4 = 15

2 + 13 = 15

6 + 9 = 15

4 + 11 = 15

0 + 15 = 15

12 + 3 = 15

14 + 1 = 15