27.5×9.9+2.75简便运算
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27.5×9.9+2.75简便运算
27.5×9.9+2.75简便运算
27.5×9.9+2.75简便运算
27.5*9.9+2.75
=27.5*(9.9+0.1)
= 275
27.5×9.9+2.75简便运算
27.5×9.9+2.75简便运算
27.5×9.9+2.75简便运算
27.5*9.9+2.75
=27.5*(9.9+0.1)
= 275