79*45+79*55-89*45+89*55 = ?

Question

79*45+79*55-89*45+89*55 = ?

Comments

В столбик или так

---

79•(45+55)+ 89•(55-45)= 79• 100+ 89•10= 7900+890= 8790.

Answer 1

3 555 + 4 345 - 4 005 + 4 895 = 8 790