Помогите (89×7+17):8+310:5=
(89*7+17):8+310:5=142 1)89*7=623 2)623+17=640 3)640:8=80 4)310:5=62 5)80+62=142
1. 89*7=623 2. 623+17=640 3.640/8=80 4.310/5=62 5. 80+62=142