(re- and un-)
(dis-, mis-, pre-)
(non-, ex-, in-, fore-)
Number Prefixes
100

I don’t need to fix all of my math homework, but I need to ____ a few problems.

redo

100

I have a lot of friends and don’t seem to _______ many people.

dislike

100

I love to _____ new museums, stores, and restaurants when I travel to a new city.

explore

100

The house had eight sides and was called the _________ house.

octagon

200

The knot was too tight so I wanted to _____ it.

undo

200

Eating the entire cake made his stomach feel some ________.

discomfort

200

Why does he write all day and night? 

The man is ______.

nonstop

200

My little sister can’t ride a bicycle yet, so she rides a _________.

tricycle

300

My glass was empty so my dad started to _____ it.

refill

300

Instead of paying at the gate, we will ______ so we can get there more quickly.

prepay

300

When it’s too cold outside we play _______ soccer.

indoor

300

Her _________ has 10 speeds and is easy to ride.

bicycle

400

I was being rude and  _______ when I didn’t invite him to the party. I’m sorry.

unkind

400

It will be fine if you use it correctly. 

But it will break if you _______ it. 

misuse

400

When I got my test back from my teacher, most of my answers were right but I got one _______.

incorrect

400

Once upon a time there was a magical _______ with a spiral horn.

unicorn

500

Once we returned from our trip we started to ______ our bags.

unpack

500

When I bake a cake, I have to _______ the oven.

preheat

500

The weather ________ for today is rainy with a little wind.

forecast

500

The fort was made in the shape of a five-sided _________.

pentagon