问题 填空题
已知
31.993
=1.2584,
319.93
=2.711,则
31993
=______,
3-0.01993
=______.
答案

∵1993=1000×1.993,

31.993
=1.2584,

31993
=12.584

∵-0.011993=-0.001×19.93,

319.93
=2.711

3-0.01993
=-0.2711.

故填12.584,-0.2711.

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