3.3*6.7+0.67*67=3.3*6.7+6.7*6.7=(3.3+6.7)*6.7=10*6.7=67
3.3*6.7+0.67*67=3.3*6.7+6.7*6.7=6.7*(3.3+6.7)=6.7*10=67
3.3x6.7+0.67x67=0.33x67+0.67x67=(0.33+0.67)x67=1x67=67因为3.3x6.7=22.110.67x67=47.8922.11+44.89=67 所以....