Tolong dong no 3-6 pake cara y

3)1,2m3+4,5dal=.......liter
(1,2×1000)liter+(4,5×10)liter
1.200liter+45liter=1245liter
4)0,75 m3-50 dal+0,5 hl=....liter
(0,75×1000)liter-(50×10)liter+(0,5×100)liter
750 liter-500 liter+50 liter
250 liter+50 liter=300 liter