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DO NOWCompare:
•3/5 ____ 0.77
•6/7 ____ 2/3
•15/20 ____ 0.2345
Physical Activity• Grab one sheet of paper and put your
name on the top• When I say “go,” get up and go to a green
fraction hanging on the wall. • You will convert the fraction in green to a
decimal. Then, you will find your answer (in red) located around the room. Go to the problem where your answer is located. Convert the fraction in green, and then go find your answer in red. Repeat.
And the winner is….
• Getting one extra credit point on their quiz!
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Vocabulary• Expression
Insert Lesson Title HereVocabulary
• Order of Operations– Take one minute to write down your steps for
getting ready for school in the morning or going to bed at night.
• Definition: the order in which operations should be done
Course 2
When simplifying a numerical expression, rules must be followed so that everyone gets the same answer. That is why mathematicians have agreed upon the order of operations.
ORDER OF OPERATIONS
1. P Perform operations within grouping symbols.
2. E Evaluate powers.
3. MD Multiply and divide in order from left to right.
4. AS Add and subtract in order from left to right.
PEMDAS
Evaluate
3 + 15 ÷ 5
3 + 15 ÷ 5
3 + 3
6
Divide.
Add.
PEMDAS
Evaluate.
Course 2
44 – 14 ÷ 2 · 4 + 6
44 – 14 ÷ 2 · 4 + 6
44 – 7 · 4 + 6
44 – 28 + 6
16 + 6
22
Divide and multiply fromleft to right.
Subtract and add fromleft to right.
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Course 2
YOU TRY
Evaluate.
A. 2 + 24 ÷ 6
2 + 24 ÷ 6
2 + 4
6
Divide.
Add.
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Course 2
Evaluate.
28 – 21 ÷ 3 · 4 + 5
28 – 21 ÷ 3 · 4 + 5
28 – 7 · 4 + 5
28 – 28 + 5
0 + 5
5
Divide and multiply fromleft to right.
Subtract and add fromleft to right.
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Course 2
WITH WORDS
Jill is learning vocabulary words for a test. From the list, she already knew 30 words. She is learning 4 new words a day for 3 days each week. Evaluate the expression 3 · 4 · 7 + 30 to find out how many words will she know at the end of seven weeks?
Day Words
Initially 30
Day 1 4
Day 2 4
Day 3 4
3 · 4 · 7 + 30
12 · 7 + 30
84 + 30
114
Multiply.
Jill will know 114 words from the list at the end of 7 weeks.
Evaluate.
Denzel paid a basic fee of $35 per month plus $2
for each phone call beyond his basic plan.
Evaluate 35 + 8(2) to find out how much
Denzel paid for a month with 8 calls outside of
the basic plan.
$51
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Course 2
YOU TRY
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Course 2
WHITE BOARDS
2 x 18 – 4 x 7
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Course 2
WHITE BOARDS
2 x (18 – 4) x 7
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Course 2
WHITE BOARDS
7(9 – 3) + 2
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Course 2
WHITE BOARDS
-11 – 3 + 7
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Course 2
WHITE BOARDS
15 – (4 x 5)
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Course 2
WHITE BOARDS
3(12−8)-4
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Course 2
EXIT TICKET
1. What is the order of operations for solving numerical expressions with whole numbers?
1. 5(6+2)+52. 23-4(6-1)3. 13 + 5 x 3 – 164. 6 (5-2) -3 x 4
