Order of Operations
Objective:
Solve equations by applying the
order of operations.
List three real-world activities that require doing
things in order.
My examples:
· putting on socks before shoes
· brushing your teeth
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Lesson 1-4: Order of Operations
Main Ideas
1) Why is order of operations
important when solving a math
problem?
3) Write the acronym and
define each letter.
2) What acronym can help
us remember the order of
operations?
Examples
6 + (4 • 12) ÷ 3
2
4 +5-2*6
Words
Making Connections: We often need order in our lives. Can you think of
a daily routine you do everyday that require a certain order (order of
operations)?
You evaluate an expression by finding
its value. To make sure everyone gets
the same result, mathematicians use
the order of operations:
1. Evaluate expressions inside parentheses 28 ÷ (9 - 5) + 32
(grouping symbols).
2. Evaluate powers.
28 ÷ 4 + 3
2
3. Multiply and/or divide from left to right.
28 ÷ 4 + 9
4. Add and/or subtract from left to right.
7+9=
16
Parentheses
Exponents
Multiplication
Division
Addition
Subtraction
Please
Excuse
My
Dear
Aunt
Sally
What Does PEMDAS stand for?
P
arenthesis
E
xponents
M
ultiplication
D
ivision
A
ddition
S
ubtraction
4 + 5 * 6 = 34
(5 +
2
10
2
5)
= 100
What
the30
steps
1)
5 *are
6=
needed to solve this?
2) 4 + 30 = 34
1)
5 +are5 the
= 10
What
steps
needed
solve
2) 10 to
* 10
= this?
100
+ (3 * 8) - 14 * 2 = 96 1) 3 * 8 = 24
What
2)
10 *are10the
= steps
100
needed to solve
3) 14 *this?
2 = 28
4) 100 + 24 = 124
5) 124 - 28 = 96
Solve the following equations using the order of operations.
Move the purple box to check your answer.
4 + 5 * 6 = 34
2
(5 + 5) = 100
2
10 + (3 * 8) - 14 * 2 = 96
3 * (4 + 7) = 33
6 + 9 * 5 = 51
2
1 + 2 * 3 = 19
MAGIC TUNNEL
Solve the equations.
Drag through the tunnel
to reveal the solution.
(7 + 43) / 5 = 10
2
115 - 10 + 3 * 5 = 30
(18 - 11) * 3 + 7 = 28
15 + 10 * 4 = 55
MAGIC TUNNEL
Solve the equations.
Drag through the tunnel
to reveal the solution.
10 - 4 / 2 * 3 = 4
14 - 7 + 5 + 1 = 13
9.5 * 2 / .5 + 45 / 5 = 47
Brain Pop ... yeah! Let's do it!
http://www.brainpop.com/math/numbersandoperations/
orderofoperations/
How old is Ms. Nave?
GREEN
· Textbook problems:
pgs 23 - 25 (#'s 1 – 54, 63, 64)
pg 51 (#'s 9 & 10)
· Handout
BLUE
· Handout
BLACK
· Handout