Răspuns :
-16/45 x (-15/8)-8/21 = -2/3 x (-1/1) -8/21 = 2/3-8/21 , aducem la același numitor = 2x7/3x7-8/21= 14/21-8/21= 6/21
- 16/45 × (- 15/8)+(-8/21)=
= 2/3 (pe care il amplificam cu 7 ) - 8/21=
= 14/21 - 8/21=
= 6/21= 2/7
= 2/3 (pe care il amplificam cu 7 ) - 8/21=
= 14/21 - 8/21=
= 6/21= 2/7