99999999+562581656
99999999+99999999=
Rút gọn biểu thức :
(99999999+22222222222222222^2)(99999999-22222222222222222^2)
A=99999999...99999999(n cs 9)
CMR : A chia hết cho 9
99999999*99999998
99999999*99999998=199999997
h mk nha ^_^
99999999*99999998= 999999700000002
dap so 99999700000002
11111111 + 99999999
99999999+999
99999999 + 999999999=?
99999999+99999999999=?