Tham khảo

My childhood is coupled not only with sweet memories of my pupil age but also a lovely dog- Cookie. Cookie was a special gift that my parents gave me on my birthday party. It is an exotic dog with a white smooth fur as velvet and a wet nose. Cookie has round bright black eyes so that he can see everything under the cover of darkness. His ears always pricks up to hear all the slightest commotion. Cookie is a playful but smart, docile and faithful dog. I feel very happy when seeing him running from outside the gate, greeting me and wrapping around my legs after every school days. not until I was in a fix did I realize that Cookie is necessarily the best companion. On a beautiful sunday morning, when I was going out for a walk with my dog, I unfortunately met an angry wild dog with eyes staring at me and likely to attack me. Cookie was ready to protect and save me without caring about his survival. Cookie has a paramount importance in my life and I promise myself to take care of him carefully.

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Tổng 2 ngày:70x2=140m

Ngày 1:   140:(2+5)x2=40m

Ngày 2:  140-40=100m

2. CR:26:(5-3)x3=39m

CD:39+26=65m

Chu vi:(65+39)x2=208m

Diện tích:65x39=2535m²

1.Số thứ 2: (83+37):(8-3)x3=75