9.6×3.4+0.96×6.6=9.6×3.4+9.6×0.66=9.6×(3.4+0.66)=9.6×4.06=(10-0.4)×4.06=10×4.06-0.4×4.06=40.6-1.624=39.976
9.6*3.4+0.96*66=9.6*3.4+9.6*6.6=9.6*（3.4+6.6） =9.6*10=96
