(300+20) •(3:10)
(420:10) -(4:2) =35
(4•120) -(420:6) =0
(300+20*3):10=36
420:(10-4):2=35
4*(120-120):6=0
(300+20) •(3:10)
(420:10) -(4:2) =35
(4•120) -(420:6) =0
(300+20*3):10=36
420:(10-4):2=35
4*(120-120):6=0