Question

$(1 \frac{1}{2} + \frac{1}{3} + \frac{1}{4} + \frac{1}{5} ) - ( \frac{1}{2} + \frac{1}{3} + \frac{1}{4} + \frac{1}{5} -1)$ =?

Answer 1

(3/2+1/3+1/4+1/5)-(1/2+1/3+1/4+1/5-1) aducem la acelasi numitor care este 120
(180+40+30+24)/120-(60+40+30+24-120)/120=
274/120+30/120=304/120 simplificam=38/15