1) 25х4х6
(20+5)*4)*6
(80+20)*6
100*6
600
2) 125х25х35
(120+5)*(20+5)*(30+5)
(2400+600+100+25)*(30+5)
(3000+125)*(30+5)
90000+15000+3750+625
109375
3) 75х36
(70+5)*(30+6)
(70*30+70*6)+(5*30+5*6)
2100+420+150+30
2100+150+450
2100+600
2700
4) 96х50
(90+6)*50
90*50+6*50
4500+300
4800