Question

37.9×0.0038+1.21×0.379+6.21×0.159=______．

Answer 1

原式=37.9×0.0038+0.0121×37.9+6.21×0.159，
=37.9×（0.0038+0.0121）+6.21×0.159，
=37.9×0.0159+6.21×0.159，
=0.159×（3.79+6.21），
=0.159×10，
=1.59．
故答案為：1.59．