Question

Vreau si eu exercitii rezolvate de clasa a VI-a cu operatii cu numere rationale . Dau coroana :)

Answer 1

1.Ordonati crescator:
3supra 4;1supra2;5supra6;2 supra 3;
-gasim numitor comun pe 12 si amplificam fractiile cu:3,6,2,4⇒9 supra 12; 
6 supra 12;  10 supra 12; 8 supra 12.
REZULTAT:6 supra 12; 8 supra12; 9 supra 12;  10 supra 12.
 

2.Calculati:
 a)7/3×5/2=35/6
b)2/5+53/5=55/5=11(am simplificat)
c)1  1/4(un intreg si 1pe 4)+3/4=5/4(am calculat intregul)+3/4=8/4

3.Rezolvati ecuatiile:
a)0,(3)x=4/3
3/9x=4/3
1/3x=4/3         (am simplificat)
x=4/3:1/3
x=4/3×3/1
x=4
b)2/3(x-1)=1/5(x-2)
2(x-1)/3=x-2/5⇒10(x-1)/15(am amplificat)=3(x-2)/15⇒
10(x-1)=3(x-2)⇒10x-10=3x-6⇒10x-3x=10⇒7x=4⇒x=4/7



               SPER CA TE-AM AJUTAT!