Question

Add:

(i) 13 and 15

(ii) -13 and 15

(iii) 13 and -15

(iv) -13 and -15

Answer 1

(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