# What n the world.docx by gegeshandong

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```									What n The World Is Happening Here?

1. Evaluate the expression   using the given values of n.

a. n = 0              b. n = 5                  c. n = 0.2

d. n = 3.5            e. n =                    f. n = 1

2. For what values of n is       ?

3. Evaluate the expression           using the given values of n.

a. n = 0              b. n = 8                  c. n = 9

d. n =                e. n =                    f. n = 12

4. For what values of n is           defined?
5. Evaluate the expression –          using the given values of n.

a. n =                     b. n = 2                   c. n = 0

d. n = 2.5                 e. n =                     f. n = 1

6. For what values of n is –          always positive?

TEACHER NOTES
Pacing (approximate time without scaffolding)
1 – 2 days for a 50 minute period
1 day for a 90 minute period

A1.2.B – Recognize the multiple uses variables, determine all possible values
of variables that satisfy prescribed conditions, and evaluate algebraic
expressions that involve variables.

Scaffolding Ideas
   Give an assignment or activity that reviews the symbols               , and
.
   Give an assignment or activity that reviews the meanings of natural, whole,
integer, rational, and real numbers.
   Give an assignment or activity that reviews integer operations.
   Give an assignment or activity that reviews fraction operations.
   Give an assignment or activity that reviews writing compound inequalities.
     Give an assignment or activity that has students practicing using their
calculators (e.g., using the negative key, parentheses, square roots, and
entering fractions).
     Explain the meaning of defined.

1a. Undefined
1b.      or 0.2
1c. 5
1d.      or
1e.     or 1.5
1f. 1
2.
3a.           or
3b. 0
3c. undefined
3d. 3
3e. 4
3f. undefined
4.
5a. 3
5b.
5c. 0
5d.
5e.     or 0.6
5f.
6.

Extension Questions
7. For what values of n is           defined?
7.

8. For what values of n is        defined?

8.

9. For what values of n is –   always negative?