matematika tolong bantu dong

16. 0.8 km = 0.8 x 1000 = 800 m
16 dam = 16 x 10 = 160 m
5000 cm = 5000 : 100 = 50 m
800 + 160 - 50 = C. 910 m

18. 3 windu kurg 1 th = 23 th
2.5 dasawarsa = 25 th
Selisih = 23 - 25 = B. 2 th