Let's solve this worksheet step by step. The goal is to
choose the correct prefix from the list:
fore-, pre-, re-, un-, dis-, mis-, sub-
to complete each word in the sentence.
---
1. Mom had to ____ heat the oven to 350° to bake the cake.
- We need a prefix that means "before" or "in advance."
-
Pre- means "before."
-
Preheat = to heat in advance.
✔ Answer: pre
---
2. To help keep the Earth clean, we ____ cycle all of our plastic.
- We are talking about recycling (reusing).
-
Re- means "again."
-
Recycle = to use again.
✔ Answer: re
---
3. I looked over my writing and found a ____ spelled word.
- A word that is spelled incorrectly.
-
Mis- means "wrongly" or "badly."
-
Misspelled = spelled incorrectly.
✔ Answer: mis
---
4. Before you take off your shoes, you need to ____ tie them.
- You need to tie them again before taking them off? That doesn’t make sense.
- But if you’re untied, you need to
retie them.
-
Re- means "again."
-
Retie = to tie again.
✔ Answer: re
---
5. You may be correct, but I ____ agree with you.
- If someone says "you may be correct, but I..." it suggests disagreement.
-
Dis- means "not" or "opposite."
-
Disagree = not agree.
✔ Answer: dis
---
6. We checked the ____ cast before we planned the event.
- We checked the weather forecast before planning.
-
Fore- means "before" or "future."
-
Forecast = prediction of future weather.
✔ Answer: fore
---
7. The big, gray ____ marine plunged down into the water.
- A
submarine is a boat that goes under water.
-
Sub- means "under."
-
Submarine = under the sea.
✔ Answer: sub
---
8. If you want to be ready for something, you need to ____ pare.
- "Prepare" means to get ready.
-
Pre- means "before."
-
Prepare = to get ready beforehand.
✔ Answer: pre
---
9. Make sure you ____ turn the library book on time!
- Return the book on time.
-
Re- means "again" or "back."
-
Return = give back.
✔ Answer: re
---
10. I try to be careful but sometimes I make a ____ take.
- A mistake when taking something.
-
Mis- means "wrongly."
-
Mistake = an error.
✔ Answer: mis
---
Final Answers:
1.
pre
2.
re
3.
mis
4.
re
5.
dis
6.
fore
7.
sub
8.
pre
9.
re
10.
mis
---
Bonus: Choose a prefix and write a sentence using the prefix with a root word.
Let’s pick
"re-" and the root word
"write" →
rewrite
✔ Sentence: *I had to rewrite my essay because I made too many mistakes.*
(Other examples could be: "She will re-read the book," "We need to reschedule the meeting.")
---
✔ Final Answer Key:
1. pre
2. re
3. mis
4. re
5. dis
6. fore
7. sub
8. pre
9. re
10. mis
And a sample sentence: *"I had to rewrite my essay."*
Parent Tip: Review the logic above to help your child master the concept of prefix worksheet for 3rd grade.
