December 3 Evaluating Expressions.notebookDecember 03, 2018
1st pair: (4, 11) (4, 6) 2nd pair: (-2, 9) (2, 9) 3rd pair: (-6, 3) (-6, -3)
Monday, December 3, 2018
Warm Up 1) Which pair of coordinates have the largest distance?(NS.8)
2. Pam sells 5 different types of flowers at a farmers' market every Saturday. The table shows the ratio fo unsold flowers to the total number of flowers of each type.
1) 3rd pair  2)150:28
What is the ratio of the total number of flowers sold to flowers unsold?(RP1)
A) 150:28 B) 28:150
C) 122:150 D) 122:28
December 3 Evaluating Expressions.notebook
Evaluate expressions at specific values of their variables using expressions that arise from formulas used in real-world problems.
SWBAT evaluate algebraic expressions at specific values by using order of operations.
LEQ: How do you substitute into, evaluate,  and check an algebraic expression? 
December 3 Evaluating Expressions.notebook
operation
constant
terms
coefficient
variable
Review.... With a partner, discuss the follow items: • What is the difference between a numerical
expression and an algebraic expression? • Label the algebraic expression with the correct
name: coefficient, constant, variable, operation, and terms.
9x - 4
We do...
You do...
2) eight more than twice her age
3) ten inches less than her height
You do...
1­ What value should be substituted for the variable?
2­ What operations can help me solve the expression? Teacher Modeling
1)
2)
3)
1­ What value should be substituted for the variable?
2­ What operations can help me solve the expression?
1)
2)
3)
• What strategy should you use after you replace the variable with the given number?
• Who still does not understand replacing the variable with a given number?
December 3 Evaluating Expressions.notebook
December 03, 2018
Complete the side for your block first. Then flip to the other side if time permits.
Independent Practice
write algebraic expressions by representing unknown quantities; and
*
*
Write an algebraic expression for each of the following statements.
Add 3 to p
(b) Subtract 2 from the product of 3 and x
(c) Divide the sum of
m and n by 5
(d) Multiply 7 to half of t
p + 3
3x – 2
m + n
Example :
following algebraic expressions.
(a) 2a + 2b (b) 100 – 2pqr (c) hjk + 8p – 19q
Answer :
100 – 2pqr has three unknown : p, q and r
*
Evaluating Algebraic Expression
*To evaluate an algebraic expression is to find the value of the expression.
STEPS:
(replace letters with the given numbers)
2. Solve using the order of operations (PEMDAS)
*
y = 2
q = 4, r = 6
4d
Solution :
4 d 4 (1)
Step 2 Solve using the order of
Operations PEMDAS.
Problem 1
*
Problem 2
*
Problem 3
If x=1 and y= -2, which expression has a value of 3?
(a) x+y (c) x-y
(b) xy (d) y-x
Problem 4
*
Using the formula
*
*
Problem 7
*
*
*
*
Problem 11
*
Problem 12
*
Problem 13
*
x=-3.
Problem 15
*