expressions lesson 6.1 group b lesson study test 5 12b
TRANSCRIPT
Expressions
Lesson 6.1
Group B Lesson Study
Test 5 •
12b
Prior Knowledge
Think-pair-share - multiplication clue words:
• double, times, each, factor, product, twice, multiplied by, per____(unit)
Prior Knowledge
Think-pair-share - division clue words:
• share, equal groups, distribute, divide, break into, how many needed
Objective
• I will create and evaluate an algebraic expression using multiplication or division.
• I will use effective language in academic discourse.
verbs
Page 5 of Discourse Book
Today we want to use one more page of our discourse book.
So before you disagree or if you need more information, please turn to page 5 of your booklet and ask a clarifying question.
1) Expression or 5) Equation?
n + 3
t + 11
23 + n = 31
16 – n
27 – 18 = n
Explain how you know the difference between an expression and an equation.
Expressions
•An expression has numbers and operation signs.
•An expression does NOT have an ________ ______.
•An algebraic expression has a _________ (a letter or symbol that represents a number).
equal sign
variable
Numerical Expressions
Example:Ismael bought 5 bags of marbles. There were 12 marbles per bag.
Translate this into an expression. Clue word:
5 x 12
5(12) or 5 • 12
per
Numerical Expressions
Example:Ismael has 60 marbles and wants to share equally with 5 friends.
Translate this into an expression. Clue word:
60 ÷ 5Be prepared to justify your answer.
share
Example:Chloe has 3 cases filled with CDs, every case holds 24 CDs.
Translate this into an expression. Clue word:
3 X 24
Be prepared to defend your reasoning!
Numerical Expressions
every
OR 3(24) OR 3 • 24
Example:Mrs. Smith canned 20 jars of peaches each day from Monday through Friday.
Translate this into an expression. Clue word:
20 x 5
Be prepared to unpack your thinking!
Numerical Expressions
each
20(5) or 20 • 5
Numerical Expressions
Example:
Katie bought 12 boxes of canned dog food. Each box had 9 cans of dog food.
Translate this into an expression.
Clue word:
12 + 9 each
Algebraic Expressions
Example: Pablo scored 3 goals in each soccer game. There were several soccer games.
Translate this into an expression. Clue word:
3 x g3g or 3(g) or 3 • g
What does the variable (g) represent?
each
Example: Susan bought several boxes of pencils. There were 15 pencils per box.
Translate this into an expression. Clue word:
b x 15 15b or 15(b) or 15 • b
What does the variable (b) represent?
Algebraic Expressions
per
Example: Beth runs 4 days a week. She runs the same number of miles each day.
Translate this into an expression. Clue word:
4 x m 4m or 4(m) or 4 • m
What does the variable (m) represent?
Algebraic Expressions
each
Find the value of:
(4 • n) if n = 7.
(4 • 7 )
28
Algebraic Expressions
Find the value of:
(13n) if n = 2.
Algebraic Expressions
Find the value of:
(14 • n) - 3 if n = 5.
Algebraic Expressions
Write and evaluate an expression.On your paper:
1. Write a multiplication or division word problem
2. Underline the clue word(s)
3. Write the multiplication or division expression
4. Explain what your variable represents
5. Illustrate
Be prepared to use discourse:
Unpack your thinking, paraphrase, and politely agree or disagree
Example:
Problem: Vincent had two pockets filled with the same amount of coins.
Expression: 2 • c
Variable: c = coins
Illustrate:
Write and evaluate an expression.On your paper:
1. Write a multiplication or division word problem
2. Underline the clue word(s)
3. Write the multiplication or division expression
4. Explain what your variable represents
5. Illustrate
Be prepared to use discourse:
Unpack your thinking, paraphrase, and politely agree or disagree