Răspuns:
Explicație pas cu pas:
1,7-2,(3)-0,(6)= 17/10- (23-2)/9-6/9= 17/10-21/9-6/9= 17/10- 27/9=17/10-3 (aduc la acelasi numitor)= 17/10- (3ori 10)/10=17/10-30/10= -13/10=-1,3
1/3-2,5+1,1(6)= 1/2-25/10+ (116-11)/90= 1/2-25/10+105/90=
Ultima fractie (105/90 o simplificam cu 3)
= 1/2-25/10+35/30=
Aducem la acelasi numitor
= (1 ori 15)/30- (25 ori 3)/30+ 35/30=
= 15/30-25/30+35/30=
= -10/30 +35/30=
= 25/30 (simplificam cu 5)= 5/6
3-1,(3)+1/6= 3-( 13-1)/9+1/6=3- 12/9+1/6= aducem la acelasi numitor
= (3 ori 18)/18- (12 ori 2)/18+ (1 ori 3)/18=
= 54/18- 24/18+ 3/18= 30/18+3/18=33/18 (simplificam cu 3)= 11/6
-2,(3) +16/3 -6,(6)= -(23-2)/9 +16/3 -(66-6)9= -21/9 + 16/3 - 60/9 =
Prima fractie (-21/9 o simplificam cu 3; iar ultima fractie 60/9 o simplificam tot cu 3)
= -7/3+ 16/3- 20/3=
= 9/3 -20/3= -11/3
