19.94x2017-19.93x2018怎么简便计算?
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19.94x2017-19.93x2018
=(19.93+0.01)×2017-19.93×(2017+1)
=19.93×2017+0.01×2017-(19.93×2017+19.93×1)
=19.93×2017+0.01×2017-19.93×2017-19.93×1
=19.93×2017-19.93×2017+0.01×2017-19.93×1
=20.17-19.93
=0.24
=(19.93+0.01)×2017-19.93×(2017+1)
=19.93×2017+0.01×2017-(19.93×2017+19.93×1)
=19.93×2017+0.01×2017-19.93×2017-19.93×1
=19.93×2017-19.93×2017+0.01×2017-19.93×1
=20.17-19.93
=0.24
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19.94×2017-19.93×2018
=19.94×2017-19.93×2017-19.93×1
=(19.94-19.93)×2017-19.93
=0.01×2017-19.93
=20.17-19.93
=0.24
=19.94×2017-19.93×2017-19.93×1
=(19.94-19.93)×2017-19.93
=0.01×2017-19.93
=20.17-19.93
=0.24
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19.94×2017-19.93×2017+19.93
=2017×(19.94-19.93)+19.93
=2017×0.01+19.93
=20.17+19.93=40
=2017×(19.94-19.93)+19.93
=2017×0.01+19.93
=20.17+19.93=40
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(19.93+0.01)*2017-19.93*(2017+1)=19.93*2017+20.17-19.93*2017-19.93=0.24
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