tolong pake caranya ya kak.

17.18dam×100=1.800
450ca=450m
11×100=1100
1100+450=1550
1.800-1.500=250m B

18.8×12=96+4=100
21/2=5/2×144=360
360+100=460D

19.Gak tau

20.2,4m×1000=2400:40=60