Elementary Test Prep: Math 4 Test (Grades 4) Mathematical Reasoning/Know if information is missing

Sometimes there are problems that do not have enough information or there is information missing.

For Example: You receive this card in the mail.

You're Invited to a Surprise Birthday Party!

For:
Date:
Place:
Time:

What do you notice about the invitation?

Information is missing.

Problems that lack information are known as
Missing Information

Problem:	Stephen read 100 pages of his book. He skipped 20 pages. How many more pages does he have to read to finish the book?
	Fact	Question
Read	He read 100 pages. He skipped 20 pages.	How many more pages does he have left to read?
Plan	To find the number of pages left, subtract.	This problem cannot be solved. There is information missing.
Missing Information	The number of total book pages.	The missing information must be supplied in order to solve this problem.
Solve	As stated, this problem cannot be solved. There is missing information.

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Remember:
Sometimes you cannot solve a problem because important information is missing.

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