tinh tong cac chu so cua A bietA=671 nhan 999...997 cong2015 100chuso9
cho a = 671*99…997+2015(co 99chu so 9).tinh tong cac chu so a
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 a =671x99999......997+2015.tinh tong cac chu so cua A
Cho A=671x99...997+2015[thua so 99...997co tat ca 99 chu so 9]Tinh tong cac chu so cua A
can bat 2 cua a=999...996 gom 100 chu so 9 tinh tong cac chu so cua a
cho m =999...99 ; n =777.......77 , tinh tong cac chu so m nhan n
cho day so 1,2,3,...,999.tinh tong cac chu so cua day so do
Tinh tong cac chu so cua A biet rang
\(\sqrt{A}=999...96 \) (100 chu so 9).
cho a = 671*999999999999........99999997.dayso tren co 99chu so 9
tong cac chu so cua a la bao nhieu
A = 671 x ( 100...00 - 3 ) + 2015 ( có 100 chữ số 0 )
A = 671 x 100 - 671 x 3 + 2015
A = 671000...00 - 2013 + 2015
A = 671000...00 + 2
A = 671000...02
Tổng tất cả các chữ số của A là:
6 + 7 + 1 + 2 = 16
Đ/s: 16