thay dau * bang nhung chu so thich hop: **+**=*97
thay dau * bang nhung chu so thich hop
**+**=*97
thay dau * bang nhung chu so thich hop
** +** =*97
moi ve cua phep tinh deu co dau gach tren dau
thay dau dau sao bang nhung chu so thich hop de co phep tinh dung 92 nhan sao sao=sao sao sao
1.Viêt tap hop M cac so tu nhien x,biet rang:x=a+b
a€={28,35} b€{13,24}
2.Thay dau*bang nhung chu so thich hop:
a)*8*3×9=70*7* b)aaa×a=3**a
c)**+**=*97
thay dau * bang chu so thich hop de do 7* la hop so
thay chu so va dau * bang cac chu so thich hop
aaa x a =3**a
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