5. (5 points) From the ten digits $0,1,2,3,4,5,6,7,8,9$, select six to fill in the blanks below to make the equation true, with one digit per blank, and all digits in the blanks must be different. $\square+\square \square=\square \square \square$ Then the largest three-digit number in the equation is $\qquad$ .
【Answer】Solution: $97+8=105$ or $98+7=105$; therefore, the answer is: 105.