mot doan duong co 6km ,doan duong kia co 4km va doan duong phia truoc co 10km ,doan duong sau co 30km .Hoi doan duong nao dai nhat?
mot duong gap khuc gom 3 doan,doan thu nhat dai bang doan thu 2,doan thu 3 dai bang hai doan dau cong lai.tinh do dai duong gap khuc do ,biet rang doan thu 3 dai hon doan thu 2 la 18cm
Duong gap khuc ABCD co AB bang 18 cm BC bang 20 cm doan thang CD ngan hon doan thang BC tinh do dai duong gap khuc ABCD
co mot doan thang dai 100000 biet cac phan khac nhau .100000 onay co the chiu thanh may doan. biet doan do x voi 30 thi bang may
Mot soi day dai 4dm 5cm. Nguoi ta cat soi day do ra thanh cac doan bang nhau, moi doan dai 5cm. Hoi cat duoc may doan? Phai cat may lan de duoc so doan do?
duong khap khuc mnpq co mn dai 3dm doan mn dai hon doan np la 12cm va dai hon doanpq 18cm tinh
a do dai cac doan thang np va pq
b do dai duong khup khuc mnpq
tren duong thang xy lay O. ve cac tia Oa;Ob thuoc 2 nua mat phang doi nhau co bo la duong thang xy. Biet aoy=1/2 boy. tinh aoy de aox=3 box
Mot thanh go dai 32dm.Neu cat thanh go dai cac doan bang nhau moi doan 40 cm thi phai cat bn lan
Hai so co tong bang 17, neu giu nguyen so hangthu nhat va themvao so hang thu 2 6 don vi thi tong moi thay doi nhu the nao ??? MOI NGUOI GIUP MK NHANHH NHE AI NHANH MINK TICK CHO