First of all, you can definitely see that the circle is 1 at a glance, because numbers can only enter 1. After knowing that the circle is 1, you must know that 1 on the right must be added with 9 to enter 1, so the square is 999 △+ 1 △ 9 = 1 △ 99.
If it is 999+199 =1198.
So the triangle on the right can only be 0, it can't be a twist.
So the triangle is 0, so it is 990+ 109= 1099.
* HOHO
I hope I can help you, thank you!