5 Minute Check
Complete on the back of your homework.
1
m = 2, n = 16 and g = 5
1. n + 8
2.
45g
3.
2n - 6
4.
7m + 8
5 Minute Check
Complete on the back of your homework.
1
m = 2, n = 16 and g = 5
1. n + 8
5 Minute Check
Complete on the back of your homework.
1
m = 2, n = 16 and g = 5
1. n + 8
16 + 8
5 Minute Check
Complete on the back of your homework.
1
m = 2, n = 16 and g = 5
1. n + 8
16 + 8
24
5 Minute Check
Complete on the back of your homework.
1
m = 2, n = 16 and g = 5
2. 45g
5 Minute Check
Complete on the back of your homework.
1
m = 2, n = 16 and g = 5
2. 45g
1
45 · 5
5 Minute Check
Complete on the back of your homework.
1
m = 2, n = 16 and g = 5
2. 45g
1
45 · 5
45
5
9
5 Minute Check
Complete on the back of your homework.
1
m = 2, n = 16 and g = 5
3. 2n - 6
5 Minute Check
Complete on the back of your homework.
1
m = 2, n = 16 and g = 5
3. 2n - 6
2 · 16 – 6
5 Minute Check
Complete on the back of your homework.
1
m = 2, n = 16 and g = 5
3. 2n - 6
2 · 16 – 6
32 – 6
26
5 Minute Check
Complete on the back of your homework.
1
m = 2, n = 16 and g = 5
4. 7m + 8
5 Minute Check
Complete on the back of your homework.
1
m = 2, n = 16 and g = 5
4. 7m + 8
7·2+8
5 Minute Check
Complete on the back of your homework.
1
m = 2, n = 16 and g = 5
4. 7m + 8
7·2+8
14 + 8
22
Flashcards
Thursday, Nov 21
Lesson 6.4
Algebra: Write Expressions
Algebra: Write Expressions
Objective: To understand how to write verbal
phrases as simple algebraic expressions.
Algebra: Write Expressions
At the end of this lesson you should be able
to answer the following question.
How can writing phrases as algebraic
expressions help you solve problems?
Algebra: Write Expressions
Writing verbal phrases as algebraic
expressions.
Step 1 – Describe the situation using the
most important words.
Algebra: Write Expressions
Writing verbal phrases as algebraic
expressions.
Step 1 – Describe the situation using the
most important words.
Step 2 – Choose a variable to represent the
unknown quantity.
Algebra: Write Expressions
Writing verbal phrases as algebraic
expressions.
Step 1 – Describe the situation using the
most important words.
Step 2 – Choose a variable to represent the
unknown quantity.
Step 3 – Convert your verbal phrase into an
algebraic expression.
Algebra: Write Expressions
e.g.
Eight dollars more than Ryan earned.
Step 1 – Describe the situation using the
most important words.
This is already condensed to the most
important words.
Algebra: Write Expressions
e.g.
Eight dollars more than Ryan earned.
Step 2 – Choose a variable to represent the
unknown quantity.
Let R = Ryan
Algebra: Write Expressions
e.g.
Eight dollars more than Ryan earned.
Step 3 – Convert your verbal phrase into an
algebraic expression.
R + 8, R = amount Ryan earned
Algebra: Write Expressions
e.g.
Ten dollars less than the original price.
Step 1 – Describe the situation using the
most important words.
Algebra: Write Expressions
e.g.
Ten dollars less than the original price.
Step 1 – Describe the situation using the
most important words.
Ten dollars less than the original price.
Algebra: Write Expressions
e.g.
Ten dollars less than the original price.
Step 2 – Choose a variable to represent the
unknown quantity.
Algebra: Write Expressions
e.g.
Ten dollars less than the original price.
Step 2 – Choose a variable to represent the
unknown quantity.
Original price = p
Algebra: Write Expressions
e.g.
Ten dollars less than the original price.
Step 3 – Convert your verbal phrase into an
algebraic expression.
Algebra: Write Expressions
e.g.
Ten dollars less than the original price.
Step 3 – Convert your verbal phrase into an
algebraic expression.
p - $10, p = original price
Why would it not be $10 - p?
Algebra: Write Expressions
Four points fewer than the Bulls scored.
Do this on your own.
Algebra: Write Expressions
Four points fewer than the Bulls scored.
B – 4, B = Points Bulls Scored.
Algebra: Write Expressions
12 times the number of feet
Do this on your own.
Algebra: Write Expressions
12 times the number of feet
12f, f = feet
Generally, when a number is multiplied by a
variable, the number is written first.
Algebra: Write Expressions
Write the phrase 5 less than 3 times the
number of points as an algebraic expression.
Step 1 – Describe the situation using the
most important words.
Algebra: Write Expressions
Write the phrase 5 less than 3 times the
number of points as an algebraic expression.
Step 1 – Describe the situation using the
most important words.
5 less than 3 times the number of points.
Algebra: Write Expressions
Write the phrase 5 less than 3 times the
number of points as an algebraic expression.
Step 2 – Choose a variable to represent the
unknown quantity.
Algebra: Write Expressions
Write the phrase 5 less than 3 times the
number of points as an algebraic expression.
Step 2 – Choose a variable to represent the
unknown quantity.
Let p = number of points
Algebra: Write Expressions
Write the phrase 5 less than 3 times the
number of points as an algebraic expression.
Step 3 – Convert your verbal phrase into an
algebraic expression.
Algebra: Write Expressions
Write the phrase 5 less than 3 times the
number of points as an algebraic expression.
Step 3 – Convert your verbal phrase into an
algebraic expression.
3p – 5, p = number of points
Generally, the term with a number and variable
comes first in an expression.
Algebra: Write Expressions
Write the phrase $3 more than four times the
cost of a pretzel as an algebraic expression.
Do this on your own.
Algebra: Write Expressions
Write the phrase $3 more than four times the
cost of a pretzel as an algebraic expression.
4p + $3, p = cost of pretzel
Algebra: Write Expressions
Shoko bought a box of popcorn for $3.50
and three medium soft drinks. Define a
variable and write an expression to represent
the total amount he spent. Then find the
total amount if one drink costs $1.50.
Do this on your own.
Algebra: Write Expressions
Shoko bought a box of popcorn for $3.50
and three medium soft drinks. Define a
variable and write an expression to represent
the total amount he spent. Then find the
total amount if one drink costs $1.50.
3d + 3.5, d = drink
3· 1.5 + 3.5
4.5 + 3.5
8
Algebra: Write Expressions
Terri bought a magazine for $5, and 2 bottles
of nail polish. Write an expression to
represent the total amount she spent. Then
find the total amount if each bottle of nail
polish costs $3.
Do this on your own.
Algebra: Write Expressions
Terri bought a magazine for $5, and 2 bottles
of nail polish. Write an expression to
represent the total amount she spent. Then
find the total amount if each bottle of nail
polish costs $3.
2d + 5, d = cost of bottle of nail polish
2·3 + 5
6+5
11
Algebra: Write Expressions
If n represents that number of songs stored on
an mp3 player, describe the meaning of:
n+7
Algebra: Write Expressions
If n represents that number of songs stored on
an mp3 player, describe the meaning of:
n+7
7 more songs
Algebra: Write Expressions
If n represents that number of songs stored on
an mp3 player, describe the meaning of:
n-2
Algebra: Write Expressions
If n represents that number of songs stored on
an mp3 player, describe the meaning of:
n–2
2 less songs
Algebra: Write Expressions
If n represents that number of songs stored on
an mp3 player, describe the meaning of:
4n
Algebra: Write Expressions
If n represents that number of songs stored on
an mp3 player, describe the meaning of:
4n
4 times the songs
Algebra: Write Expressions
If n represents that number of songs stored on
an mp3 player, describe the meaning of:
n÷2
Algebra: Write Expressions
If n represents that number of songs stored on
an mp3 player, describe the meaning of:
n÷2
Half the songs
Algebra: Write Expressions
How can writing phrases as algebraic
expressions help you solve problems?
Algebra: Write Expressions
Agenda Notes
Homework –
Homework Practice 6-4
Due Friday, Nov 22
Mid-Chapter 6 Quiz –
Friday, Nov 22