Arrange the steps for converting 10 inches to centimetres using the supplied factor.

### The order 1. **Identify the given length as 10 inches.** This establishes the starting value and unit. 2. **Write the conversion factor as 2.5 cm per inch.** The factor comes from the supplied equivalence, $1\ \text{in}=2.5\ \text{cm}$. 3. **Multiply so inches cancel.** The calculation is $10\ \text{in}\times 2.5\ \text{cm}/\text{in}=25\ \text{cm}$. 4. **Report the result in centimetres.** Centimetres are the requested target unit. ### Worked numbers - **Given**: $10\ \text{in}$. - **Find**: length in centimetres. - **Convert**: $1\ \text{in}=2.5\ \text{cm}$. - **Solve**: $10\ \text{in}\times 2.5\ \text{cm}/\text{in}=25\ \text{cm}$. - **Answer**: $25\ \text{cm}$. - **Check**: inches cancel, leaving centimetres. ### Terms - **Inch (in)**: a unit of length. - **Centimetre (cm)**: a metric unit of length. - **Conversion factor**: a ratio that converts one unit to another. ### Remember Put the target unit on top so the starting unit cancels.