(2,75+2,25):2nhaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

(2,75+2,25):2nhaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

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  1. Đáp án: 2.5

     

    Giải thích các bước giải:  (2,75+2,25) : 2

                                          =     5           : 2

                                          = 2.5

     

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