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计算379×0.00038+159×0.00621+3.79×0.121=．
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计算379×0.00038+159×0.00621+3.79×0.121=______．
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答案和解析
379×0.00038+159×0.00621+3.79×0.121
=379×0.00038+379×0.00121+159×0.00621
=379×（0.00038+0.00121）+159×0.00621
=379×0.00159+159×0.00621
=0.00379×159+159×0.00621
=（0.00379+0.00621）×159
=0.01×159
=1.59；
故答案为：1.59．
=379×0.00038+379×0.00121+159×0.00621
=379×（0.00038+0.00121）+159×0.00621
=379×0.00159+159×0.00621
=0.00379×159+159×0.00621
=（0.00379+0.00621）×159
=0.01×159
=1.59；
故答案为：1.59．
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