Prefix and suffix practice worksheet for students to complete sentences by choosing the correct prefix.

You're right — this is a prefix worksheet. The title says “Prefix Suffix,” but the instructions say:
> *“Choose the proper prefix to complete each word.”*

So we are only looking for prefixes (not suffixes) to fill in the blanks.

Let’s go through each sentence one by one and find the correct prefix that makes sense both grammatically and contextually.

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1. Mom had to ______heat the oven to 350° to bake the cake.

✔ Answer: pre- → preheat

> *Preheat* means to heat something (like an oven) before using it. This is a common cooking term.

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2. To help keep the Earth clean, we cycle all of or plastic.

⚠️ This sentence seems incomplete or miswritten. It probably meant:
> “To help keep the Earth clean, we recycle all of our plastic.”

✔ Answer: re- → recycle

> *Recycle* = to process used materials so they can be used again.

*(Note: The original says “all of or plastic” — likely a typo for “all of our plastic.”)*

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3. I looked over my writing and found a ______spelled word.

✔ Answer: mis- → misspelled

> *Misspelled* = spelled incorrectly. A very common word in writing contexts.

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4. Before you take off your shoes, you need to ______tie them.

✔ Answer: untie → But wait — “untie” starts with un-, which is a prefix.

> *Untie* = to loosen or undo a knot. Makes perfect sense here — you need to untie your shoes before taking them off.

✔ So answer: un-

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5. You may be correct, but I ______agree with you.

✔ Answer: dis- → disagree

> *Disagree* = to have a different opinion. Fits perfectly with “You may be correct, but I...”

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6. We checked the ______cast before we planned the event.

✔ Answer: fore- → forecast

> *Forecast* = to predict (especially weather). We check the weather forecast before planning events.

*(Note: “fore-” is the prefix here — though sometimes “forecast” is treated as one word, it comes from “fore” + “cast”)*

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7. The big, gray ______marine plunged down into the water.

✔ Answer: sub- → submarine

> *Submarine* = a vessel that can operate underwater. “Sub-” means under.

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8. If you want to be ready for something, you need to ______pare.

✔ Answer: pre- → prepare

> *Prepare* = to get ready. “Pre-” = before; “pare” is not a root on its own, but “prepare” comes from Latin “praeparare.”

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9. Make sure you ______turn the library book on time!

✔ Answer: return

> *Return* = to give back. The prefix here is re-.

> “Re-” means again or back. So “return” = to turn back.

✔ So answer: re-

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10. I try to be careful but sometimes I make a ______take.

✔ Answer: mistake

> *Mistake* = an error. The prefix is mis-.

> “Mis-” means wrong or badly → “mistake” = to take wrongly.

✔ So answer: mis-

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## ✔ Final Answers:

1. pre-
2. re-
3. mis-
4. un-
5. dis-
6. fore-
7. sub-
8. pre-
9. re-
10. mis-

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## 📝 Bonus Tip:
Prefixes change the meaning of a root word. Common ones include:
- pre- = before
- re- = again/back
- mis- = wrong
- un- = not
- dis- = not/opposite
- sub- = under
- fore- = before

This worksheet helps students understand how prefixes build new words with related meanings.

Let me know if you’d like a printable version or flashcards for these prefixes! 😊