berapa jumlah 1000m:4dm=....cm 21.000dam×30hm=....dam

1000m = 100000 cm
4 dm = 40 cm
100000 cm : 40 cm = 2500 cm

30 hm= 300 dam
21000 dam * 300 dam = 6300000 dam

1. m⇒⇒cm= x 100
   dm⇒⇒cm= x 10
   100.000 cm : 40cm=2500cm
2, hm⇒⇒dam= x 10
   21.000dam x 300dam=6.300.000 dam