3.52×6.2+3.52×4.8-3.52、=3.52×（6.2+4.8-1）=3.52×x10=35.2
3.52×6.2+3.52×4.8-3.52=3.52×6.2+3.52×4.8-3.52×1=3.52×(6.2+4.8-1)=3.52×10=35.2
