1. 3 km+2,8hm+50cm ....m 2. 15 kuintal +250ons -3/4 ton....kg Tlong kk d bantu

1. (3 km×1000)+(2,8×100)+(50÷100)
3000 m +280 m + 0,5 m
3280,5
2. (15×100)+(250÷10)-3/4×1000
1500+25-750
775

semoga membantu