Question

8. The addition of 3mn, -5mn, 8mn and -4mn is
(i) mn
(ii) -mn
(iii) 2mn
9. When we subtract 'a' from '- a', we get
(ii) 2a
(iii) -2a
10. In an expression, we can add or subtract only...
(i) Like terms (ii) Unlike terms (iii) All terms
() 0
(iv) -a
(iv) None of the above​

Answer 1

Answer:

8.(iii)2mn

9.(iii)-2a

10.(i)like terms