8.9*9.9+11*0.99怎么简便计算?

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8.9*9.9+11*0.99怎么简便计算?
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8.9*9.9+11*0.99怎么简便计算?
8.9*9.9+11*0.99怎么简便计算?

8.9*9.9+11*0.99怎么简便计算?
8.9*9.9+11*0.99
=89+0.99+11*0.99
=(89+11)*0.99
=100*0.99
=99
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8.9*9.9+11*0.99
=89*0.99+11*0.99
=(89+11)*0.99
=100*0.99
=99