问题 填空题

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

答案

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.

故答案为:1.59.

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