Hello there.
Question: Geno has two hamsters,zippy is 94 millimeters long popcorn is 8.7 centimeters long.How much longer is zippy in millimeters?
Answer: Convert 8.7 cm to mm
8.7 cm = 87mm
Then work out the difference between the two numbers.
94mm - 87mm = 7mm.
In short, Your answer is that Zippy is 7mm longer than Popcorn.
Hope This Helps You!
Good Luck Studying ^-^