Question

Calculeaza cat mai rapid posibil:
A)1/3+1/4+1/5+2/3+3/4+4/5;
B)5/2+7/3+11/6-3/2-4/3-5/6;
Ajutatimmaa va rogg!!!!!!!!!!!!!!!!!11

Answer 1

a) 1/3 + 1/4+ 1/5 + 2/3 + 3/4 + 4/5=
aducem la acelasi numitor, numitorul comun este 60
(1x20)/60 + ( 1x15)/60 + (1x12)/60 + ( 2x20)/60 + (3x15)/60 + ( 4x12)/60 =
20/60 + 15/60 + 12/60+ 40/60 + 45/60 + 48/60=
(20+15+12+40+45+48)/60=
180/60=simplific cu 10= 18/6 simplific cu 6 = 3

b)5/2+ 7/3+ 11/6 - 3/2 - 4/3 - 5/6 =
aducem la acelasi numitor, numitorul comun este 6
(3x5)/6 +( 2x7)/6 + 11/6 -( 3x3)/6 - (4x2)/6 -5/6 =

15/6 + 14/6 + 11/6 - 9/6 - 8/6 -5/6=
(15+14+11-9-8-5)/6=18/6 simplific cu 6= 3