tolong ya pake cara pliss soalnya dikumpulin hari ini

4.
6 3/8 = 51/8 x 125/125 = 6.375/1000
1,7 = 17/10
225‰ = 225/1000

6 3/8 : 1,7 : 225‰ = 6.375/1000 : (17/10 x 225/1000) = 6.375/1000 x 10.000/3.825 = 1,667 x 10 = 16,67 (C)

5.
s = 0,6 km = 6/10 km
t = 80 detik = 80/3600 =1/45 jam
v = s/t
v = 6/10 : 1/45
v =  6/10 x 45
v = 54/20
v = 270/10
v = 27 km/jam
jawaban A

6.
anis = 1 2/3 x diah
anis = 5/3 x 1,8
anis = 5 x 0,6
anis = 3 m
jawaban B

7.
banyak kantong plastik = 50 : 1/2 = 50 x 2 = 100 kantong
jawaban C