Answer: If a pencil is 7 1/2 long it would be 18.415 centimeters long.
Step-by-step explanation: Convert the whole number part of the measurement to centimeters: Since there are 2.54 centimeters in an inch, we can multiply the whole number part (7) by 2.54 to get the equivalent length in centimeters. In this case, 7 inches is equal to 7 x 2.54 = 17.78 centimeters. Convert the fractional part of the measurement to centimeters: To convert the fractional part (1/2) of an inch to centimeters, we need to divide it by 2 and then multiply by 2.54. Since 1/2 divided by 2 is 1/4, we can calculate 1/4 x 2.54 = 0.635 centimeters. we can add the results to get the total length in centimeters. 17.78 centimeters + 0.635 centimeters = 18.415 centimeters.
I hope this helps!