A ) MUON THU LAI PHEP CONG , TA LAY TONG TRU DI MOT SO HANG , NEU DUOC KET QUA LA SO HANG CON LAI THI PHEP TINH LAM DUNG .  

B ) MUON THU LAI PHEP TRU , TA LAY SO BI TRU CONG VOI HIEU , NEU DUOC KET QUA LA SO TRU THI PHEP TINH LAM DUNG .

BAI TREN LA DUNG GHI D , SAI GHI S NHE

AI NHANH MINH TICK !            

hay van dung ket qua phan a ma cac ban vua lam ra la A<1/2

chung to 1/3+2/3^3+3/3^3+4/3^4+...+100/3^100<3/4

1.Rut gon cac phan so sau:

a)45/60=..... 

b)54/135=.....

2.Dung ghi D,Sai ghi S:

a)Mot con ngua chay voi van toc 8 m/giay.Vay van toc cua con ngua tinh bang km/gio la:

A.28,8km/gio

B.48km/gio

Nho ve mua xuan Vu Bang khong chi dung lai o canh vat ma con huong ngoi but cua minh den khong khi gia dinh don tet: "nhang tram den nen,...,khong khi gia dinh doan tu em dem,...lam cho lonh anh am la am lung.".Theo em,nhung cau van ay chua dung tam su gi cua tac gia

Ban em noi la viec xay dung ra dinh van hoa la cua bo me . Theo em dung hay sai ? Vi sao ?

nhanh ho minh nha ! thank you

tai sao bac ho ban nhieu viec ma van danh thi gio day cac chien si hoc ? viec lam ay cho em nhan ra bac ho la nguoi nhu the nao

Dung va lam co tong so bi la 150 vien bi .Dung co 20% bi do .lam co 15% bi do .tong so bi do.tong so bi do cua 2 ban la 27 vien.tinh tong so bi cua moi ban

lam dua ngu vai ra :

ro rang cai phep tinh do tui lam dung ma k like 

quan no thi sai day ra

tui lam nhu vay la buoc ngan nhat rui do

nguuuuuuuuuuuuuuuuuu