“3.6+6.4×0.73”的简便算法。
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3.6+6.4×0.73
=3.6×(0.73+0.27)+6.4×0.73
=0.73×(3.6+6.4)+3.6×0.27
=7.3+9×0.4×9×0.03
=7.3+81×0.012
=7.3+81×(0.01+0.002)
=7.3+0.81+0.162
=8.272
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3.6+6.4×0.73
=3.6×(0.73+0.27)+6.4×0.73
=0.73×(3.6+6.4)+3.6×0.27
=7.3+9×0.4×9×0.03
=7.3+81×0.012
=7.3+81×(0.01+0.002)
=7.3+0.81+0.162
=8.272
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