1-4: Order of Operations

1. 1-4: Order of Operations

2. http://studyjams.scholastic.com/studyjams/jams/math/algebra/aorder-of-operations.htmhttp://studyjams.scholastic.com/studyjams/jams/math/algebra/aorder-of-operations.htm

3. G E M D LEFT TO RIGHT A S

4. P: ( ) [ ] E: exponents M: x D: A: + S:

5. k

6. Order of Operations Where do I start?

7. You evaluate an expression by finding its value..."working the problem" Jack and Jill were asked 
to evaluate the 
expression 3 + 4 x 2 and got different answers! 11 14

8. Jack explained 
how he got his 
answer.... 3 + 4 x 2 = 7 x 2 = 14

9. Jill explained 
how she got her 
answer.... 3 + 4x 2 = 3 + 8 = 11

10. To make sure everyone gets the 
same results, mathematicians 
have agreed on a set of rules 
called the order of operations.

11. Let's solve numeric expressions! Hi, Aunt Sally! Thank 
you for coming to 
teach us about solving 
expressions today.How 
was your trip here? Pull or click the arrows 
to learn about my trip 
here and the Order of 
Operations Pull Me!

12. Paralleled 
perilous 
poles Evaded 
enraged 
elephants Manipulated and dodged 
multiple trees and divides 
as they appeared Ambled swiftly around 
snakes and army ants Please Excuse My Aunt Dear Sally 3 For Looking Too Rough From Left To Right

13. 23 + (6-3) x 4 ÷ 2+8= These bars look like 
parenthesis! Take care of 
whatever is inside of these 
first, then set the problem 
back up. There may be more 
than one set in an expression. 23 + 3 x 4 ÷ 2+8=

14. Aunt Sally 
to the 
Elephant 
power! 23 + (6-3) x 4 ÷ 2+8= 23 + 3 x 4 ÷ 2+8= 2x2x2 Next, simplify any 
exponents (powers) in the 
expression by performing 
repeated multiplication. 
The tiny number tells you 
how many times a number 
is multiplied by itself. 8 + 3 x 4 ÷ 2+8= 3 Click here!

15. 23 + (6-3) x 4 ÷ 2+8= 23 + 3 x 4 ÷ 2+8= 8 + 3 x 4 ÷ 2+8= Then, divide or multiply 
from left to right. Solve 
one problem before 
answering the next! 8 + 12 ÷ 2+8= 8 +  6 +8=

16. 23 + (6-3) x 4 ÷ 2+8= 23 + 3 x 4 ÷ 2+8= Finally, subtract and 
add any remaining 
facts as they appear 
from left to right. 8 + 3 x 4 ÷ 2+8= 8 + 12 ÷ 2+8= 8 +  6 +8= 8 + 6 + 8= 14 + 8= =22 From Left To Right Will lead you to the correct answer!

17. Jack and Jill were asked 
to evaluate the 
expression 3 + 4 x 2 14 11 So, who was right?

18. What Does PEMDAS stand for? P arenthesis E xponents M ultiplication D ivision A ddition S ubtraction

19. Explore... Drag the step into the table to work your way through 
the end of each row to reveal the value of the 
expression. add or subtract multiply or divide multiply or divide evaluate inside parentheses multiply or divide add or subtract evaluate powers evaluate inside parentheses multiply or divide

20. Solve these expressions 
using the rules we just 
learned. How did order 
affect the results? 144 - (7 x 12) = (144 - 7) x 12 = 144 - 84 = 60 137 x 12 = 1644 Pull Pull Pull Pull (7 x 12) + 144 = 7 + 144 x 12 = 84 + 144 = 228 7 + 1728 = 1735 Pull Pull Pull Pull Please Aunt Excuse My 3 Dear Sally

21. Practice Questions 13 1. 32 + 4 3. (3x5) + (6/2)18 4. 22 + 5 x 2 14 6. 3 x (22 + 1) 15 7. (8 - 3 ) x 2 + 1020 8. (5-1)2 + 4 -2 x 1 18 9. 10 / 5 - 2 + 1010 10. (52 + 4) - 10 19

24. Ch 1-4 Grade: «grade» «subject» Subject: «date» Date:

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