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2022-05-02 20:07:19
Diện Tích xung quanh của phòng học là :
Sxq=8x6x5=240m2
Diện tích cần quét vôi là: 240-4,5=235,5 m2
2022-05-02 19:46:23
Số số hạng của A =(303-0):3+1=102
-> A=(303+0).102:2=15453
2022-05-02 19:43:57
70% của 2 =70%.2=1,4
_______1/7=70%.1/7=0.1