How do you find the sum #abs(18+(-13))#? Prealgebra Negative Numbers and Absolute Value Negative Numbers 1 Answer Steve M Jan 15, 2017 5 Explanation: # |x| = { (-x, x lt 0), (0, x = 0), (x, x gt 0) :} # So #|18+(-13)| = |18-13|=|5|=5# Answer link Related questions How do you compute #-8+13#? How do you compute #11+(-19)#? How do you compute #-19-8#? How do you compute #-77+(-46)#? How do you compute #41+(-56)#? How do you compute #50-82#? How do you compute #-47-13#? How do you compute #-80+102#? How do you compute #5(18)#? How do you compute #-64div(-8)#? See all questions in Negative Numbers Impact of this question 1350 views around the world You can reuse this answer Creative Commons License