Question

Calcule. e) 2/5 + 1/8 + 3/4 = ?f) 1/3 + 7/9 - 5/6Ajudem por favor!!!

Answer 1

e) 2/5 + 1/8 + 3/4 = (2/5)×8 + (1/8)×5 + (3/4)×10= 16/40 +5/40+30/40=51/40
f) 1/3 + 7/9 - 5/6= (1/3)×6 + (7/9)×2 - (5/6)×3= 6/18 +14/18 -15/18=5/18