Question

vreau punctul d si f.​

Answer 1

Salut,

d) (7/9+17/10-1/18)-(13/27-1/18)=

=(10×7+17×9-5)/90-(2×13-3)54=

=(70+153-5)/90-23/54=

=218/90-23/54

f)(7/16+17/5-1/40)-(5/8-3/5)=

=7/16+17/5-1/40-(25/40-24/40)=

=7/16+17/5-1/40-(25-24)/40=

=7/16+17/5-1/40-1/40=

=(5×7)/80+(16×17)/80-2/80=

=35/80+272/80-2/80-2/80=

=(35+272-2-2)/80=

=(3007-4)/80=

=303/80

$by \\ 7646$

Answer 2

f) (70/160+554/160-4/160)-(25/40-24/40)

610/160-1/40

610/160-4/160=606/160 = 303/80

d) (140/180+306/180-10/180)-(26/54-3/54)

436/180-23/54

1308/540-230/540

1078/540=539/270