Questions: Find the sum of 128.5 cm + 45 mm. The sum of measurement is cm.

Solution Steps

To find the sum of the measurements given in different units, first convert all measurements to the same unit. In this case, convert millimeters to centimeters since the final answer is required in centimeters. Then, add the converted values together.

To convert \( 45 \, \text{mm} \) to centimeters, we use the conversion factor \( 1 \, \text{cm} = 10 \, \text{mm} \): \[ \text{mm to cm} = \frac{45 \, \text{mm}}{10} = 4.5 \, \text{cm} \]

Now, we add the converted value to the original measurement in centimeters: \[ \text{Total} = 128.5 \, \text{cm} + 4.5 \, \text{cm} = 133.0 \, \text{cm} \]

Final Answer