1. **Problem statement:** Convert 2030 millimetres into centimetres and metres. 2. **Formula and rules:** - To convert millimetres to centimetres, use the fact that 1 centimetre = 10 millimetres. - To convert millimetres to metres, use the fact that 1 metre = 1000 millimetres. 3. **Conversion to centimetres:** $$\text{centimetres} = \frac{\text{millimetres}}{10}$$ $$= \frac{2030}{10} = 203$$ So, 2030 millimetres = 203 centimetres. 4. **Conversion to metres:** $$\text{metres} = \frac{\text{millimetres}}{1000}$$ $$= \frac{2030}{1000} = 2.03$$ So, 2030 millimetres = 2.03 metres. **Final answers:** - a) 203 centimetres - b) 2.03 metres