19 Free Printable Prefix Worksheets 4th Grade - Free PDF at ... - Free Printable

Let’s go step by step through each sentence and figure out the correct prefix to complete the word.

We’re looking for prefixes that make sense in context — like “re-”, “un-”, “mis-”, “pre-”, etc.

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1. Mom had to ______ heat the oven to 350° to bake the cake.

→ You heat something again? That’s reheat.
✔ Prefix: re

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

Wait — this sentence seems broken. It says “cycle all of or plastic.” Probably meant: “we recycle all of our plastic.”
So the missing word is recycle → prefix: re

But note: The blank isn’t shown here in the original text as written — let me check the image description again.

Actually, looking at the user’s uploaded text:

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

That doesn’t have a blank! But in the image (which I can’t describe), there must be a blank before “cycle”. So likely it’s:

“We ______ cycle all of our plastic.” → recycle

✔ Prefix: re

*(Note: If no blank exists, maybe typo — but based on standard worksheets, it’s almost certainly “recycle”)*

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3. I looked over my writing and found a ______ spelled word.

→ A word spelled wrong = misspelled
✔ Prefix: mis

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

→ Wait — if you’re taking off shoes, why tie them? That doesn’t make sense.

Ah — probably it’s: “Before you take off your shoes, you need to untie them.”

Yes! You untie laces before removing shoes.

✔ Prefix: un

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5. You may be correct, but I ______ agree with you.

→ Not agreeing = disagree
✔ Prefix: dis

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6. We checked the ______ cast before we planned the event.

→ Checked ahead of time = forecast? No — forecast is weather.

Wait — “cast” could mean group of actors? Then “previewed the cast”? Or “pre-checked”?

Actually — common phrase: “We checked the broadcast”? Doesn’t fit.

Another idea: “We checked the telecast”? Too specific.

Wait — think about planning an event — maybe they checked the schedule? Not matching.

Hold on — perhaps it’s “pre-cast”? Like pre-cast concrete? Unlikely.

Alternative: Maybe it’s “newcast”? No.

Wait — what if it’s “forecast”? As in weather forecast affecting event planning? Possible.

But let’s look at #7:

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7. The big, gray ______ marine plunged down into the water.

→ “Marine” means sea creature. Big gray one that plunges? Whale? Dolphin?

“Submarine”? Yes! Submarine goes underwater.

✔ Prefix: sub

Then back to #6: If #7 is “submarine”, then #6 might be “broadcast”? Still not fitting.

Wait — another thought: “We checked the downcast”? No.

Perhaps it’s “upcast”? No.

Wait — maybe it’s “re-cast”? Like recasting actors? Possible for event planning.

But let’s try logic: What prefix makes sense with “cast” when planning an event?

Actually — I think it’s “forecast” — meaning predicted conditions (weather) before planning outdoor event.

✔ Let’s go with fore

*(Alternatively, if it’s about people, “cast” = actors, then “pre-cast” doesn’t work — “re-cast” would mean changing actors — possible. But “forecast” fits better with “planned the event” — checking weather first.)*

I’ll stick with fore for now.

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

→ “Pare” alone means trim. But “prepare” = get ready.

So: prepare

✔ Prefix: pre

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9. Make sure you ______ turn the library book on time!

→ Return it late? No — return it ON time.

But the word is “turn” — so “return” the book.

Prefix: return

✔ Prefix: re

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10. I try to be careful but sometimes I make a ______ take.

→ “Mistake” — yes!

Prefix: mistake

✔ Prefix: mis

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Now let’s list them clearly:

1. reheat → re
2. recycle → re *(assuming blank before "cycle")*
3. misspelled → mis
4. untie → un
5. disagree → dis
6. forecast → fore *(best fit for event planning context)*
7. submarine → sub
8. prepare → pre
9. return → re
10. mistake → mis

Wait — double-check #6.

Is there a better fit?

What if it’s “broadcast”? Like TV broadcast schedule? Possible.

Or “telecast”? Less common.

But “forecast” is most logical for event planning — checking weather forecast.

Also, note: In some curricula, “forecast” is taught with “fore-” prefix.

Similarly, #2: if the sentence is “we ___ cycle”, then “recycle” is correct.

All others seem solid.

Final check:

- rehear? No — reheat ✔️
- mis-spell ✔️
- un-tie ✔️
- dis-agree ✔️
- fore-cast ✔️
- sub-marine ✔️
- pre-pare ✔️
- re-turn ✔️
- mis-take ✔️

Perfect.

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