TL:

Số lớn nhất có ba chữ số tròn chục là :  990

HT

là 990 

HT 

dễ sao ko tự làm??mắc gì hỏi

28 dễ cũng mang ra hả em

\(=81\)

\(9x9=81\)                                                                                                                                                                                                       chúc bn học tốt nghen                                                                                                                                                                                         xin tiick

      TÓM TẮT :

Một gói mì                  : 80 g

Một hộp sữa               : 455 g

2 gói mì và 1 hộp sữa :... g ?

     BÀI GIẢI :

Hai gói mì cân nặng là :

  80 x 2 = 160 ( g )

Hai gói mì và một hộp sữa nặng là :

   160 + 455 = 615 ( g )

      Đáp số : 615 g bạn nhé

350 : 7 = 50

420 : 6 = 70

350:7=50

420:6=70

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