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37.9×0.0038+1.21×0.379+6.21×0.159=.
题目详情
37.9×0.0038+1.21×0.379+6.21×0.159=______.
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答案和解析
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.
=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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