Add 13 And 15

Add: (i) 13 and 15 (ii) -13 and 15 (iii) 13 and -15 (iv) -13 and -15

Answers:

(i) 13 and 15
13 + 15 = 28
(ii) -13 and 15
(-13) + 15 = 2
(iii) 13 and -15
= (13) + (-15)
= 13 – 15 = -2
(iv) -13 and-15
= (-13) + (-15)
= -13 – 15 = -28