Question

Tính:

Answer 1

1)-6/13+-7/13+2= (-6/13+-7/13)+2=-1+2=1

 

Answer 2

k: =-5/27-4/27+1/3=-9/27+1/3=0

m: =(4/7+2/7+1/7)+(3/4+5/4)=1+2=3

n =(-5/7-2/7)+(3/4+1/4)-1/5=-1/5