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7 lt = 7 × 100 = 700 cl
15 lt = 15 × 100 = 1500 cl
12 dm³ = 12 × 100 = 1200 cl
25.000 - (700 + 1500) - 1200
= 25.000 - 2200 - 1200
= 21.600 cl
2) 1 4/5 ltr/mnt = 9/5 × 1000/60
= 9/5 × 100/6
= 30 cm³/dtk (D)
3) 720 m³/jam = 720 × 1000 / 3600
= 720 × 10/36
= 200 l / dtk (B)
4) t = 120 ltr / 40 ltr/mnt
= 3 mnt (A)
5) d = 35 ml/dtk
vol = 35 ml = 0,035 ltr
vol = 0,035 × 1/60
= 0,00058 ltr
6) 0,95 m³ × 1000
= 950 ltr (c)