cho m=999...99 (100 chu so 9) va n=777....77(100 chu so 7) tinh tong cac chu so cua m nhan n
cho m =999...99 ; n =777.......77 , tinh tong cac chu so m nhan n
tinh tong cac chu so cua a biet a=671nhan 100chu so 9cong chu so 7 cuoi cung cong 2015
cho day so 1,2,3,...,999.tinh tong cac chu so cua day so do
chung to cac phan so sau bang nhau:
7/9 = 77/99 = 777/999
Tim 1 so co 3 chu so biet khi dem so do nhan nhan voi tong cac chu so trong so do ta duoc 1000
tim 1 so co 2 chu so ma tong cac chu so da cho =6. so do=5/17 so nhan duoc tu so da cho = cach dao nguoc thu tu hang cua cac chu so cua no?(ghi cả bài giải) thank you!
cac so le co 3 chu so tu 101 den 999 thi tong cong co bao nhieu chu so
Cho A=671x99...997+2015[thua so 99...997co tat ca 99 chu so 9]Tinh tong cac chu so cua A
