27.26-(13.6-2.76)简便?
2个回答
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27.26-(13.6-2.76)
=27.26+2.76-13.6
=27.26+2.74+0.02-13.6
=30-13+0.02-0.6
=17-0.6+0.02
=16.42
=27.26+2.76-13.6
=27.26+2.74+0.02-13.6
=30-13+0.02-0.6
=17-0.6+0.02
=16.42
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