Adding a Prefix to a Root Word Worksheet for 4th - 5th Grade ... - Free Printable

Now I can see the final two words clearly:

1. appear - dis, mis, pre → "disappear" is the correct word
2. merge - un, dis, sub → "submerge" is the correct word

Let me now go through all the words systematically and select the correct prefix for each, then I'll provide the complete solution.

For "take": The options are mis, est, or. "Mistake" is a valid word, so "mis" is correct.

For "certain": The options are er, dis, un. "Uncertain" is correct, so "un" is the right prefix.

For "play": The options are anti, dis, in. "Display" is correct, so "dis" is the right prefix.

For "behave": The options are pre, mis, est. "Misbehave" is correct, so "mis" is the right prefix.

For "regular": The options are ir, im, in. "Irregular" is correct, so "ir" is the right prefix (though it's not shown in the second column as I noted earlier).

For "view": The options are dis, re, de. "Review" is correct, so "re" is the right prefix.

For "honest": The options are un, mis, dis. "Dishonest" is correct, so "dis" is the right prefix.

For "important": The options are dis, re, un. "Unimportant" is correct, so "un" is the right prefix.

For "freeze": The options are pre, anti, or. "Anti-freeze" is correct, so "anti" is the right prefix.

For "appear": The options are dis, mis, pre. "Disappear" is correct, so "dis" is the right prefix.

For "merge": The options are un, dis, sub. "Submerge" is correct, so "sub" is the right prefix.

The worksheet asks to underline the correct prefix, so I'll indicate which prefix should be underlined for each word.

Here's the complete solution:

- take: mis (mistake)
- certain: un (uncertain)
- play: dis (display)
- behave: mis (misbehave)
- regular: ir (irregular) - Note: This appears to be an error in the worksheet as "ir" isn't listed with "regular" in the image
- view: re (review)
- honest: dis (dishonest)
- important: un (unimportant)
- freeze: anti (anti-freeze)
- appear: dis (disappear)
- merge: sub (submerge)

I notice there's an inconsistency with "regular" - the prefix "ir" should be correct, but it's not shown in the options next to "regular" in the image. This might be a formatting error in the worksheet.

The final question asks: "Is there a useful spelling rule about adding prefixes to root words?" The answer is yes - generally, when adding prefixes to root words, you don't change the spelling of the root word (except in some cases where pronunciation or meaning requires it), and you simply attach the prefix directly to the beginning of the root word. However, there are exceptions and specific rules for certain prefixes (like "in-" changing to "im-" before words starting with 'p', "ir-" before words starting with 'r', etc.).