+6.6+(-5.2)-(-3.8)+(-2.6)-(+4.8)=6.6-5.2+3.8-2.6-4.8=1.4+3.8-7.4=5.2-7.4=-2.2
=6.6-2.6+3.8-(5.2+4.8)=7.8-10=-2.2
-2.2
