20hm-3000dm-400m=......m

20 hm - 3000 dm - 400 m
= 20 × 100 - 3000 : 10 - 400 m
= 2000 - 300 - 400 m
= 1700 - 400 m = 1300 m

jwb ban nya =20hm=2000m
300dm=30m
400m=40m
2000-30-40
=1930
maaf kalau slh