sau khi them bot o hai so thi tong moi la : 4090 + 178 - 2360 = 1908
Vi them o so thu nhat 178 don vi va bot o so thu hai 2360 don vi thi luc dau so thu nhat phai be hon so thu hai
vay luc dau so thu nhat la : 1908 : 2 = 954
so thu hai la : 4090 - 954 = 3136
to khong biet co dung khong nua ????