Question

1/15 + -5/6 + 1/9
11/8 + 7/3 - ( 11/8 + 7/3)
0,2 + (13/4 - 13/4) + (-1,2)

Sincer sa fiu, le-am uitat, a trecut vara, nu m-am ocupat, mi-ar prinde bine o mana de ajutor, va multumesc frumos ! :)

Answer 1

1/15 - 5/6+1/9 = (1*6 -5*15+1*10)/90= (6-75+10)/90= - 59/90
11/8 +7/3 -11/8- 7/3=0
2/10 +0 - 12/10= 1/5 - 6/5= - 5/5= -1

Answer 2

1/15+-5/6+1/9=(1/15-5/6)+1/9=>2-(5*5)/30= -23/30=>-23/30+1/9=>-23*3+10 totul/90 =-59/90=0,65556
11/8+7/3-(11/8+7/3)=(11/8+7/3)-(11/8+7/3)=>(11/8+7/3)-89/24=>11*3+7*8 totul/24=84/24=>89/2-89/24=>89-(89)/24=0/24=0
0,2+(13/4-13/4+(-1,2)=>0,2+0+(-1,2)=0,2-1,2=-1