300.3+30.03+3.003+3.0003-0.6333
=300.3+30.03+3.003+3.0003-(0.3+0.03+0.003+0.003+0.3)
=300.3-0.3+30.03-0.03+3.003-0.003+3.0003-0.003-0.3
=300+30+3+3-0.3
=336-0.3
=335.7
300.3+30.03+3.003+3.0003-0.6333
=300.3+30.03+3.003+3.0003-(0.3+0.03+0.003+0.003+0.3)
=300.3-0.3+30.03-0.03+3.003-0.003+3.0003-0.003-0.3
=300+30+3+3-0.3
=336-0.3
=335.7