8.1*0.6+0.81*4简便

8.1*0.6+0.81*4简便
2025-04-14 19:19:35
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回答1:

8.1*0.6+0.81*4简便
8.1*0.6+0.81*4
=8.1*(0.6+0.4)
=8.1*1
=8.1