chu co 5 chu
bo dau la 1 loai vu khi
bo chu cuoi thanh 1 con vat
bo chu dau se la 1 loai hoa
do cac ban do
cho mot so co ba chu so ma chu so hang tram la 4. neu xoa bo chu so 4 nay di, ta duoc 1 so co hai chu so. Biet tong cu so co ba tru so da cho va so co hai chu so co duoc sau khi xao chu so 4 la 450. Tim ba chu so da cho ban dau
tim cac so co 2 chu so,biet tich 2 chu so do la 18 va hieu 2 chu so do la 3.giup minh nha
tim mot so co hai chu so,biet rang tich cua hai chu so bang 20 va trong do co mot chu so la 6
bài 1: a) binh nghi ra mot so .Biet rang so lon nhat co hai chu so hon so do la 65.tim so binh da nghi.
b) an nghi ra mot so. biet rang so do be hon so be nhat co ba chu so la 15. tim so an da nghi.
bai 2: tu ba chu so 5, 2, 3 an lap duoc so lon nhat va so be nhat co mat du ba chu so do , roi tinh hieu hai so vua lap duoc . hieu do la bao nhieu ???nhanh len nhe mik dang can rat gap
To chua biet phep tinh nay ;xin cac ban giup toi do la mot hinh vuong canh dai 200mm, chu vi cua hinh vuong
Hinh chu nhat co chu vi la 76cm , biet chieu dai la 20cm chieu rong hinh chu nhat bang canh hinh vuong. Tinh chu vi hinh vuong do . Moi nguoi giup em bai toan nay voi a .
trong mot phep du ,biet so chia la so chan lon nhat co mot chu so, thuong bang 245 va biet so du la so lon nhat co the co .tim so bi chia cua phep ting do?