tolong dijawab semuanya yah, pake cara (1-15)

1=3x10.000+10x1000=30000+10000=40000centimeter
2=2x1000+3x100=2000+300=2300meter
3=20x100+10x10=2000+100=2100desimeter
4=15x1000+14x100=15000+1400=16400milimeter