Question

mental math: 13+ ? =5

Answer 1

Answer:

13 - 8 = 5

Explanations:

13 + ? = 5

To know the value of ?, subtract 13 from both sides of the equation

13 + ? - 13 = 5 - 13

? = 5 - 13

? = -8

Therefore:

13 + (-8) = 5

13 - 8 = 5