21 st century lessons evaluating expressions the order of operations 1
TRANSCRIPT
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Warm Up/Do NowOBJECTIVE: SWBAT indentify and begin to follow the order of operations when evaluating expressions.
Agenda
2
Evaluate:4310
647
3520
)21(9
234
1) 2)
3) 4)
5)
34 1
5 3
13
Scaffolding
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Agenda:
1) Warm Up 2) Launch
3) Explore
4) Practice
5) Assessment/Exit Slip
4
Marvin’s Trick- Independent
Agenda
The Four Students Problem- Partners
Whole class
Partners
Independent
OBJECTIVE: SWBAT indentify and begin to follow the order of operations when evaluating expressions.LANGUAGE OBJECTIVE: SWBAT to discuss and interpret why the order of operations are important and identify the words expression and evaluate.
Independent
Discussion-Lesson-
Notes- Recourses for Your Notebook- Independent
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Launch- Marvin’s Trick
Agenda
5
has a challenge for you!Marvin the “Amazing Math Magician”
Hey class, bet you can’t make 75 with the numbers:
3 7 10 15
But, you must use all 4 numbers only once.
You can use any operation you like addition, subtraction, multiplication or division, more than once, and in any order you choose.
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3 7 10 15
How did you make 75 with the 4 numbers?
Launch- Marvin’s Trick
Agenda
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A way to make
3 7 10 15
75
107 31575
70 5
using
Expression??????This is a way to write the work you did as one math expression.
Numbers and symbols grouped together that show the value of something.
Launch- Marvin’s Trick
Agenda
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Explore- The Four Students Problem
8
Agenda
Marvin challenged four students to evaluate this problem 2346
Your task with your partner is to determine how the students obtained their answer.
900346 2 Juan150346 2 Melinda
42346 2 Shawn
Student’s results90346 2 Ashley
Support your response with evidence, by listing the operations in the order in which the student did them.Your group is responsible for 2 or 4 students.
Evaluate?
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Marvin challenged four students to evaluate this problem.
JuanMelinda
Shawn
Click names
Ashley
Agenda
Online
Calculator
All studentsand summary
PC Users
Next slide
Discussion
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Resources for Your Notebook
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Agenda
The Order of Operations
42
1)
Think back to the warm up. Is there a problem that contained any symbol Shawn didn’t use?
1) Parentheses or Grouping Symbols
Click to open warm up.
2346 Shawn’s Work
2) Exponents
946 9
3) Multiplication/Division
36636
4) Addition/Subtraction(Left to Right)
(Left to Right)
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Practice- Partners
1) 2) 20 ÷ (6 – 1)
3) 10 + 23 – 5 4) 9 + 3 + 9 ÷ 3
5) 6 + 10 ÷ 2 – 1 6) 2 + 5 x 6 ÷ 2
Directions: Using the Order of Operations, evaluate the following expressions.
Agenda
4773
Let’s do number 1 and 2 together!!
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Directions: Using the Order of Operations, evaluate the following expressions.
Practice
Scaffolding
1
4
4773
48
3 41)
Agenda
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Directions: Using the Order of Operations, evaluate the following expressions.
Practice
)5(
4
)16(20 20
2)
AgendaScaffolding
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Practice
1) 2) 20 ÷ (6 – 1)
3) 10 + 23 – 5 4) 9 + 3 + 9 ÷ 3
5) 6 + 10 ÷ 2 – 1 6) 2 + 5 x 6 ÷ 2
Directions: Using the Order of Operations, evaluate the following expressions.
8 4
13 15
10 17
Agenda
4773
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Assessment/Exit Slip
25
2423 Amy
4315 Evaluate :1) 341 2 2)
3)Who is correct?
245220
400
1623 32335
Agenda
Jamal2423
3 14
Woops!! Amy added first