Transcript In-class Quiz Review PowerPoint

Expressions Unit Quiz Review
6th Book: Ch. 6—Lessons 1, 3 & 4
7th Chapter: Ch. 5—Lessons 1 & 4
Book: 6-1
• Be sure you can write products as powers and
powers as products and find the value if
needed
• Giant squids live more than 123 feet below
sea level. Write the power as a product of the
same factor. Then find the value.
• With a total of more than 3 x 3 x 3 x 3 x 3 x 3
home runs, Barry Bonds holds the major
league record for the most home runs. Write
this product using an exponent. About how
many home runs did Barry Bonds have?
7th Chapter: 5-1
• When evaluating expressions…
– Plug in the value for each variable and rewrite the
expression
– Follow order of operations to solve
• Evaluate each expression if r = -5, s = 2, t = 7,
and u = 1
1.) 5r – 4
3.)
(𝟑+𝒖)²
𝟖
2.) 4r – 10s
4.) rst
Book: 6-4
• Writing phrases as algebraic expressions
– Look for key words that tell you what operation to
do
– Choose a variable to represent the unknown
quantity
– Translate phrase into expression
Write each phrase as an algebraic expression
• Four times as many apples
• 3 more than twice as many ringtones as Mary
7th Chapter: 5-1
• Write expression from word problems:
1.) Your mom wins $100 on a scratch-off ticket. She
wants to split it between you and your sisters.
-Write an expression to find how much each of you
will receive if there are c children.
-If there are 4 children, how much will each
receive?
• Write expression from word problems:
2.) It costs $5 to get into the county fair. Packets of
ride tickets cost $2 each.
-Write an expression to find the total cost if you go
to the fair and purchase t packets of tickets.
-If you purchase 8 packets of tickets, what will your
total cost be?
7th Chapter: 5-4
• Distributive Property
– Multiply the number on the outside by both terms
inside the parentheses
– Answer should be 1 number if only numbers are
involved
• Ex: 7(3 + 12)
– If you have variable term and number term, DO
NOT put them together
• Ex: 11(x + 5) = 11x + 55
• Exs:
1.) -9(4 – x – 4y)
2.) 4(4x – 5y + 3)
• You and 4 friends are going to see a movie.
You each want your own popcorn and a drink.
The tickets cost x dollars, the popcorn is $4.50,
and the drinks are $2.75. Write an expression
using the Distributive Property to find the
total cost of going to the movie and simplify.