What sign comes first?
3x4+3
3x9+7
34
List the Order of Operations
Parentheses
Exponents
Multiplication/Division
Addition/Subtraction
Place the missing parentheses to make this problem true:
8+12 / 5 - 3 = 1
(8+12) / 5 - 3 = 1
Sylvia bought 4 bananas for 50 cents each and 1 apple for 80 cents. Write a numerical expression to represent this situation and then find the total cost in dollar.
280 cents or $2.80
5+6/2x4
Division
12+36/4
21
What is a numerical expression?
an expression that contains numbers and operations
Place the missing parentheses to make this problem true:
7 x 4 - 1 - 7 x 2 = 21
7 x (4-1) -7 x 2 = 21
Robert bought 2 burgers for $3.50 each and 3 medium French fries for $1.20 each. Write a numerical expression to represent this situation and then find the cost.
$10.60
3+4 x 3 +(8/2)
Division
(14-12)x(10+2)+7
31
What does it mean to evaluate?
to solve or find the value of
Place the missing parentheses to make this problem true:
6 + 3 x 2 - 5 + 7 -1 = 13
6 + 3 x 2 - 5 + (7 -1) = 13
Martha pays 20 dollars for materials to make earrings. She makes 10 earrings and sells 7 for 5 dollars and 3 for 2 dollars. Write a numerical expression to represent this situation and then find Martha's profit?
$21
3x6+(8-2+6)x4
Subtraction
7x(4-1)-7x2
21
What is the definition of Order of Operations?
the rules that say which calculation comes first in an expression
Place the missing parentheses to make this problem true:
18 - 2 x 3 + 6 x 3 = 30
18 - 2 x 3 + (6 x 3) = 30
John bought 3 pants for 25 dollars each and paid with a one hundred-dollar bill. Write a numerical expression to represent this situation and then find how much money John gets back from the cashier?
$25
3x5-[2-(3+4)x4]-4
Addition
-1x[(3-4x7)/5]-2x24/6
-3
When solving addition and subtraction, what direction do you solve the problem?
From left to right
Place the missing parentheses to make this problem true:
9 + 12 / 3 + 4 / 2 + 1 x 2 = 11
(9 + 12) / 3 + 4 / 2 + 1 x 2 = 11
Peter withdrew 1000 dollars from his bank account today. He uses 500 to fix his car. Then, he divide the money into 5 equal parts and gave away 4 parts and kept 1 part for himself. Finally, he took to wife to the restaurant and spent 60 dollars on meals. Write a numerical expression to represent this situation and then find how much money Peter has now?
$40