bagaimana no 3,4,dan 5?? kurang paham sy

3. 2/5×0,85
2,5×85/100
170/500:5=34/100=0,35 liter
4. 1menit =1,2 km
22,5mnt=n
22,5×1,2=27 km
5. 1/3×6,5
1/3×65/10
65/30=2 5/30=2 1/6kg