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