Question

como faz essas expressoes

[(-1/6)+(1/2-1/3)]-[2/3+(-1/2-5/6)]

1/5-[2/3-(2/6-1/12)]+5/6)]


me ajudem por favor

Answer 1

a)[(-1/6)+(1/2-1/3)]-[2/3+(-1/2-5/6)]=
[(-1/6)+( 3-2/6)]-[2/3+(-3-5/6)]=
[(-1/6)+1/6]-[2/3+(-8/6)]=
0-[4-8/6]= -[-4/6]= 4/6

b)1/5-[2/3-(2/6-1/12)]+5/6)]=
1/5-[2/3-( 4-1/12)]+5/6)]=
1/5-[2/3-(3/12)]+5/6)]=
1/5-[8-3/12]+5/6]=
1/5-[5/12+5/6]=
1 /5-[5+10/12]=
1/5-15/12= 12-75/60= -63/60