Question

cum se rezolva:(-3)+(-7)+(-11)-(-21)-(-1)=?

Answer 1

(-10)+(-11)+21+1
-21+21+1
0+1

Answer 2

(-3)+(-7)+(-11)-(-21)-(-1);
=-3-7-11+21+1;
=-10-11+21+1;
=-21+21+1;
=0+1;
=1;