(i) We have,

200 g

We know that,

1 kg = 1000 g

Therefore,

200 g = kg

= 0.2 kg

(ii) We have,

3470 g

We know that,

1 kg = 1000 g

Therefore,

3470 g = kg

= 3.470 kg

(iii) We have,

4 kg 8 g

We know that,

1 kg = 1000 g

Therefore,

4 kg + 8 g = 4 kg + kg

= 4.008 kg