[133:7-45:(57×10-565)] ×409

Răspuns :

[133:7-45:(57×10-565)] ×409=
[19-45:(570-565)] ×409=
(19-45:5)×409=
(19-9)×409=
10×409=
4 090
[133÷7-45÷(57×10-565)]×409=
=[133÷7-45÷(570-565)]×409
=(133÷7-45÷5)×409
=(19-9)×409
=10×409
=4090