tinh tong cua :so lon nhat va so be nhat co 4 chu so khac nhau .
so le lon nhat va so chan so be nhat co 4 chu so co tong cac chu so bang 4.
bai 1 ; tuoi cua anh va tuoi cua em cong lai la 34 tuoi . Anh hon em 6 tuoi . Tinh tuoi cua moi nguoi
bai 2 ; mot thua ruong hinh chu nhat co chu nvi la 360 m , chieu rong be hon chieu dai la 20m . Tinh dien tich thua ruong
bai 3 ; tong cua hai so chan la 45 . Tim hai so do , biet rang giua chung chi co 5 so le
bafi 4 ; tong cua cac chu so cua mot so co hai chu so bang 11 . Neu thay doi thu tu cua cac chu so thi da cho tang them 27 don vi . Tim so do
giai ho minh nhe
Mot phep cong co hai so hang la so chan lien tiep .Tong cac so :so hang thu nhat so hang thu hai va tong bang 276.Tim phep cong do biet so hang thu nhat lon hon so hang thu hai
tinh trung binh cong tat ca cac so chan co 2 chu so. hoi trung binh cong co tat ca cac so chan co 2 chu so la
a) cho 20 so chan lien tiep biet rang so chung binh cong la 101 tim so lon nhat
b) tich 19 x 29 x 39 x ..... x ket qua co chu so tan cung la may
c) tinh tong cua 30 so le lien tiep tu 123 tro di . tong cua cac so do la
Mot phép cong co hai so hang la hai so chan Liên tiep tong các so so hang thu nhat tong so so hang thu hai la1276 tim các so hang cua phép tinh do biết so hang thu mhat lon hon so hang thu hai
Tinh tong cac so chan co 2 chu so?
tinh tong cac chu so chan co 3 chu so
tinh tong cac so chan tu 2 den 2000
