Các câu hỏi tương tự
Thay dau * boi chu so thich hop de co 517**chia het cho ca ba chu so 6,7,9
thay cac dau * boi cac chu so thich hop de:*1994* chia het cho 99
thay chu a va dau * boi chu so thich hop de aaa x a = ***a
cac chu so o dau * ko nhat thiet phai bang nhau
thay các dau * boi các chu so thich hop de *1994* chia hết cho 99
a, phan tich so 111 ra thua so nguyen to roi tim tap hop cac uoc cua 111.
b, thay dau * boi chu so thich hop:
** . * =111
thay dau x boi cac so thich hop de cac so sau day la cac so nguyen to 12x ; 36x
Thay dau * boi cac chu so thich hop:
3**:*3=3*
cac dau *va cac chu boi cac chu so thich hop
a,*8*3x9=70*7*
thay*boi cac chu so thich hop duoi dang hop so.
a. 3*
b. 7*