Răspuns :
4/63+1/18-4/35=15/126-4/35=75-168/630=-93/630=-31/210
4/63 +1/18 -4/25 *5/7=
4/63 +1/18 -4/35 aducem la acelasi numitor
(40+35-72)/630= (75-72)/630= 3/630= 1/210
4/63 +1/18 -4/35 aducem la acelasi numitor
(40+35-72)/630= (75-72)/630= 3/630= 1/210