Các câu hỏi tương tự
thay chu so va dau * bang cac chu so thich hop
aaa x a =3**a
abxcb=ddd thay bang cac chu so thich hop do ai giai duoc
thay xmy bang cac chu so thich hop de 21x7y chia het cho ca 5 va 9
THAY a va b BANG CAC CHU SO THICH HOP SAO CHO 24a68b CHIA HET CHO 45
Thay cac dau * bang cac chu so thich hop de co mot phep tinh dung:
***-**=1
****-***=1
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 day * bang cac chu so thich hop de duoc 1 phep tinh dung
a)***:**=2
b)****:***=2
giup menh voi
thay dau * bang nhung chu so thich hop: **+**=*97
thay*boi cac chu so thich hop duoi dang hop so.
a. 3*
b. 7*