To revise prefixes.
Look at these words
semicircle, semi- final, semi- conscious
Notice that sometimes a hyphen is used to separate the prefix from the root word, but there is no rule about how this so you need to check a dictionary if you are unsure.
Look at the words below
multitude, multiply, multipurpose
What does the prefix multi- mean?
1. “I know my multiplication tables!” exclaimed the boy.
2. The convenience store sells multipacks of orange juice.
3. A multitude of stars were shining in the night sky.