Add: (i) 7/5 and 2/5 (ii) (-4)/9 and 2/9 (iii) 5/(-12) and 1/12 (iv) 4/(-15) and –(7/15) (v) (-7)/25 and 9/(-25) (vi) (-7)/26…
Answers:
(i) 7/5 and 2/5 = 7/5 + 2/5
= (7 + 2)/5 = 9/5
(ii) (-4)/9 and 2/9 = (-4)/9 + 2/9
= {(-4) + 2}/9 = (-2)/9
(iii) 5/(-12) and 1/12 = (-5)/12 + 1/12
= (-5 + 1)/12 = (-4)/12 = -(4/12)
(iv) 4/(-15) and –(7/15) = (-4)/15 + 7/15
= (-4 + 7)/15 = 3/15
(v) (-7)/25 and 9/(-25) = (-7/25) + (-9)/25
= {(-7) + (-9)}/25 = (-16)/25
(vi) (-7)/26 and 7/(-26) = (-7)/26 + (-7)/26
= {(-7) + (-7)}/26 = (-14)/26