Question

Puteti va rog sa faceti exercitiul 7? Dau coroana!

Answer 1

Răspuns:

Explicație pas cu pas:

a) (7·2+17·3)/18-(5·3-1)/18=(14+51)/18-(15-1)/18=65/18-14/18=51/18=17/6

b)(17·3+5·2)/72-(5·3-10)/180=61/72-5/180=61/72-1/36=(61-2)/72=59/72

c)(3+7/9-1/2)-(45-2)/48=(3+5/18)-43/48=3+5/18-43/48=3+(5·8-43·3)/144=

=3+(40-129)/144=3+89/144 =3  =89/144

d)(7·10+17·9-5)/90-(13·3-2)/54=(70+153-5)/90-37/54=218/90-37/54=

=109/45-37/54=2+19/45-37/54=2+(6·19-37·5)/270=2+(114-185)/270=

=2-71/270= 1 199/270

e)(13·5+17·7)/315-(5·3-4)/108=(65+119)/315-11/108=184/315-11/108

f)(7·5+16·17-2)/80-(25-24)/40=(35+272-2)/80-1/40=305/80-2/80=

=303/80