0.75*9.9+0.075 简便计算
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0.75*9.9+0.075简便计算0.75*9.9+0.075简便计算0.75*9.9+0.075简便计算0.75*9.9+0.075=0.75*9.9+0.75*0.1=0.75*(9.9+0.1
0.75*9.9+0.075 简便计算
0.75*9.9+0.075 简便计算
0.75*9.9+0.075 简便计算
0.75*9.9+0.075
=0.75*9.9+0.75*0.1
=0.75*(9.9+0.1)
=0.75*10
=7.5
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0.75*9.9+0.75*0.1=0.75*(9.9+0.1)=7.5
=0.75*9.9+0.75*0.1
=0.75*10
=7.5