Let’s go step by step to fill in the correct prefix for each sentence.
We are looking for prefixes that make sense with the root word given after the blank. Common prefixes include: re-, un-, dis-, pre-, mis-, sub-, over-, under-, etc.
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1. Mom had to ______ heat the oven to 350° to bake the cake.
→ “Heat” is the root. We often say “reheat” when heating something again. But here, it’s the first time — so maybe not “re-”. Wait — actually, ovens are often *preheated* before baking. That’s a common cooking term!
✔ pre- → preheat
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2. To help keep the Earth clean, we cycle all of or plastic.
Wait — this sentence seems broken. It says “we cycle all of or plastic.” Probably meant: “we recycle all of our plastic.”
So the root is “cycle”, and we need a prefix to mean “do again” → that’s “re-”
✔ re- → recycle
*(Note: The sentence has a typo — should be “recycle all of our plastic” — but based on context, “re-” fits.)*
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3. I looked over my writing and found a ______ spelled word.
→ Root: “spelled”. If it’s wrong, we say “misspelled”. Prefix “mis-” means wrongly.
✔ mis- → misspelled
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4. Before you take off your shoes, you need to ______ tie them.
→ You untie shoes before taking them off. Root: “tie”. Prefix “un-” means reverse action.
✔ un- → untie
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5. You may be correct, but I ______ agree with you.
→ Root: “agree”. If you don’t agree, you “disagree”. Prefix “dis-” means opposite.
✔ dis- → disagree
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6. We checked the ______ cast before we planned the event.
→ Root: “cast”. In events, we talk about “forecast” — like weather forecast or planning ahead. “Fore-” means before.
✔ fore- → forecast
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7. The big, gray ______ marine plunged down into the water.
→ Root: “marine”. A submarine goes underwater. “Sub-” means under.
✔ sub- → submarine
*(Note: “gray submarine” is also a famous Beatles song — helps remember!)*
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8. If you want to be ready for something, you need to ______ pare.
→ Root: “pare”? That doesn’t sound right. Probably meant “prepare”. So prefix “pre-” again.
✔ pre- → prepare
*(Typo in worksheet? Should be “prepare”, not “pare” — but “pre-” still fits.)*
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9. Make sure you ______ turn the library book on time!
→ Root: “turn”. When returning a book, you “return” it. Prefix “re-” means back/again.
✔ re- → return
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10. I try to be careful but sometimes I make a ______ take.
→ Root: “take”. If you make a mistake, you “mistake”. Prefix “mis-” means wrong.
✔ mis- → mistake
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Now let’s list all answers clearly:
1. pre
2. re
3. mis
4. un
5. dis
6. fore
7. sub
8. pre
9. re
10. mis
Final Answer:
1. pre
2. re
3. mis
4. un
5. dis
6. fore
7. sub
8. pre
9. re
10. mis
Parent Tip: Review the logic above to help your child master the concept of prefixes and suffixes worksheet for grade 3.
