Solution:
Certainly! To convert millimeters to centimeters, you need to know that 10 millimeters make up 1 centimeter. So, to convert 45 millimeters to centimeters, you divide 45 by 10.$$ 45 \text{ mm} \div 10 = 4.5 \text{ cm} $$Therefore, 45 millimeters equals 4.5 centimeters.