ARUSDG rade8 Warm Up Chapter3 by HC121104002213

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									                                          Date
                   Warm-Up (Chapter 3.1)

Today’s Objective/Standards:
           CST/CAHSEE:                       Review:

Translate the verbal phrase into   Solve and check:
a variable expression.

Seven less than nine times a
number                                  c – 31 = 14

  A)   7n - 7
  B)   70 - n
  C)   9n - 7
  D)   7 - 9n

Why can choice A, B and D be
eliminated?

              Current:                       Other:

                                   Write each phrase as a
Combine Like Terms:                variable expressions:
Simplify      z + 5y + 3 + y          The sum of twice a
                                       number and 8

                                      The quotient of 25
                                       and 5 times a number.


                                                 Format: PDG Jan. 2005
                                          Name ____________

                     Warm Up (Chapter 3.2)
          CST/CAHSEE:                          Review:

                                   Which expression
                                   represents a difference of
                                   two numbers?

                                     A)   6–y
                                     B)   6+y
                                     C)   6y
                                     D)   6÷y
Prove why Choices A, B and C are
not the correct answers.           If a friend was absent on the
                                   day this lesson was taught and
                                   you were reviewing, why
                                   would you recommend
                                   eliminating Choice C and
                                   Choice D?
              Current:                          Other:
Which expression matches
the following phrase: one          Write an integer that
less than the product of a         represents the situation:
number and 3?
                                   Seventeen degrees below
  A.       n+3–1                   zero
  B.       3n – 1
  C.       n–3–1
  D.       3(n – 1)
Today’s Objective/Standards:

                                                   Format: PDG Jan. 2005
                                       Name ____________

                 Warm Up (Chapter 3.3)
         CST/CAHSEE:                       Review:
You and a friend are on a        Use a number line to find
canoe trip. The trip is 56 miles the sum.
long. The first day you travel
18 miles. How many more
miles do you have to travel to
                                          9 + (– 4)
complete the trip?


                                What other graphical
Write an equation model.        representation could be
Solve and justify your          used to find the correct
reasoning.                      answer?
           Current:                        Other:

At 1 p.m. the temperature was   Find the sum.
67 and at 3 p.m. the
temperature was 86 . How        38 + (– 21) + 15
much did the temperature
increase by 3 p.m.?




Today’s Objective/Standards:


                                                Format: PDG Jan. 2005
                                      Name ____________

                    Warm Up (Chapter 3.4)
  Today’s Objective/Standards:

          CST/CAHSEE:                       Review:

                                 Simplify the expression.
                                 Then evaluate the
                                 expression when x = 2

                                       – x + 4x + 8


Your friend thinks either B or
C is the best answers. How
can you help your under that A
is the best answer?
             Current:                       Other:

Which expression does not have Describe the patter. List
a value of -3?                 the next 3 numbers you
                               expect to find in the
  a. – 2 + (– 1)               sequence.
  b. –10 + (–7)
  c. – 6 + 3                   10, 12, 15, 19, __, __, __
  d.  3–3–3

  Today’s Objective/Standards:

                                             Format: PDG Jan. 2005
                                       Name ____________

                  Warm Up (Chapter 3.5)
          CST/CAHSEE:                         Review:


                               Find the difference:

                                             – 5 – 10


                               What are two methods
Why can Choice A be easily     can be used to simplify?
eliminated?
             Current:                         Other:

                               Find the value of the expression
Describe and correct the       a – b when a = 2 and b = –3.
error.
                                  A.    –4
                                  B.    –3
 –9–8                             C.    –2
                                  D.     0
= 9 + (– 8)
=+1




Today’s Objective/Standards:
                                               Format: PDG Jan. 2005
                                      Name ____________

                 Warm Up (Chapter 3.6)
         CST/CAHSEE:                      Review:
                               The product of two positive
                               integers is always positive
                                (True or False)
                               Provide an example.




What choice would you
eliminate easily and why?

           Current:                       Other:


The product of a positive      The product of two
and a negative integer is      negative integers is always
always negative (True or       negative (True or False)?
False)?
Provide an example             Provide an example




Today’s Objective/Standards:
                                             Format: PDG Jan. 2005
                                     Name ____________

                  Warm Up(Chapter 3.7)
         CST/CAHSEE:                        Review:

                               Evaluate the expression
                               when x = – 3




Explain why Choices A, B
and C can be eliminated.

           Current:                         Other:


Find the product:              Simplify:

    (–7) (– 4)                 3x – 5– 2x




Today’s Objective/Standards:

                                               Format: PDG Jan. 2005
                                       Name ________________

                      Warm Up (Chapter 3.8)
         CST/CAHSEE:                      Review:
Write an equivalent:
                                Evaluate the expression
                                when x = 5.




Why can Choice A and
Choice B be easily
eliminated?

           Current:                           Other:

                             The absolute value of a
The sum of two negative      negative integer is the
integers is always negative? opposite of that integer?
Is the above statement true? True or False?
Use example to make the
statement true.              Prove why the statement is
                             true.

Today’s Objective/Standards:

                                                 Format: PDG Jan. 2005

								
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