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

Let's solve this "Add a Prefix" worksheet step by step. The goal is to choose the correct prefix from the word bank — re, un, dis — and add it to each root word to form a meaningful new word.

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🔤 Word Bank:

- re – means "again" or "back"
- un – means "not" or "opposite of"
- dis – means "not" or "opposite of", often used in more formal or negative contexts

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Now, let’s go through each word:

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1. please → displease
- *dis* + please = displease (to make someone unhappy)
✔ dis

2. able → unable
- *un* + able = unable (not able)
✔ un

3. draw → redraw
- *re* + draw = redraw (to draw again)
✔ re

4. happy → unhappy
- *un* + happy = unhappy (not happy)
✔ un

5. agree → disagree
- *dis* + agree = disagree (not agree)
✔ dis

6. usual → unusual
- *un* + usual = unusual (not usual)
✔ un

7. tell → retell
- *re* + tell = retell (to tell again)
✔ re

8. equal → unequal
- *un* + equal = unequal (not equal)
✔ un

9. obey → disobey
- *dis* + obey = disobey (not obey)
✔ dis

10. write → rewrite
- *re* + write = rewrite (to write again)
✔ re

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✔ Final Answers:

1. please → dis
2. able → un
3. draw → re
4. happy → un
5. agree → dis
6. usual → un
7. tell → re
8. equal → un
9. obey → dis
10. write → re

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📝 Summary:

We used:
- un for negation (not): unable, unhappy, unusual, unequal
- dis for negation (often more formal): disagree, disobey
- re for repetition: redraw, retell, rewrite

Note: Both un and dis can mean "not," but they are used with different words. For example:
- We say unhappy, not *dishappy*
- We say disagree, not *unagree*

So the choice depends on standard usage.

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✔ Completed Worksheet Answer Key:

| Number | Root Word | Prefix |
|--------|-----------|--------|
| 1 | please | dis |
| 2 | able | un |
| 3 | draw | re |
| 4 | happy | un |
| 5 | agree | dis |
| 6 | usual | un |
| 7 | tell | re |
| 8 | equal | un |
| 9 | obey | dis |
| 10 | write | re |

Let me know if you'd like a printable version or explanation for any specific word!