Respuesta :

Answer:

Sum of 15 and 5 is 20

Difference between 9 and 5 is 4

Step-by-step explanation:

Answer:

15 + 4 = 19 or 15 - 4 = 11

Step-by-step explanation:

Sum of 15 are: 6 and 9, 7 and 8, 8 and 7, 9 and 6

9+6 = 15

8+7 = 15

The difference between 9 and 5 is 4.

9-5 = 4

5-9 = -4

In all

15 + 4 = 19 or 15 - 4 = 11

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