Final answer:
To convert 7 centimeters and 8 millimeters to millimeters, we convert 7 centimeters to millimeters and add it to 8 millimeters. The total is 78 millimeters.
Step-by-step explanation:
To convert centimeters to millimeters, we need to know that 1 centimeter equals 10 millimeters. So, to convert 7 centimeters to millimeters, we multiply 7 by 10, which equals 70 millimeters.
Next, we need to convert 8 millimeters to millimeters. Since millimeters are already in millimeters, there is no need to convert. Therefore, 8 millimeters is simply equal to 8 millimeters.
Finally, to find the total in millimeters, we add the conversion of 7 centimeters to millimeters (70 millimeters) and the original 8 millimeters. So, 7 centimeters and 8 millimeters equals 78 millimeters.
Learn more about converting centimeters and millimeters