tolong di jawab ya... Maaf kalo ga keliatan..

1.5 3/7 + 2/3=
   5 9/21+14/21=6 2/21
2. 4 7/9-2 1/5-2/15=
    (4-2)+ 35/45-9/45-6/45=2 20/45
3. 60KM/2 Jam=500M/menit
    60 km x1000=60000
    2 jam=120menit 
     60000:120=500
4. 3000 L=3 m^3
     1 jam =60 menit 
      3x60=180m^3/jam
      Semoga membantu ya maaf kalau salah :)