Properties of + and x
Which of the following equations shows the Commutative Property of Addition?
a) 7 + 0 = 7
b) 4 + 6 = 6 + 4
c) 1 + (3 + 9) = (1 + 3) + 9
b) 4 + 6 = 6 + 4
What does PEMDAS stand for?
Parentheses, Exponents, Multiplication, Division, Addition, and Subtraction
Which of the following numbers is the exponent?
53
3
What is 429 in word form?
a) 249
b) 400 + 20 + 9
c) four hundred and twenty nine
c) four hundred and twenty nine
What does a numerical expression NOT have?
An equals sign
Which of the following equations shows the Associative Property of Addition?
a) 8 + (14 + 2) = (8 + 14) + 2
b) 2 x 1 = 2
c) 19 + 17 = 17 + 19
a) 8 + (14 + 2) = (8 + 14) + 2
Which operation would you solve first and WHY?
24 ÷ 8 x 3
Division because in PEMDAS you solve multiplication and division from left to right (whatever you see first)
Which of the following numbers is the base?
92
9
What is 7,601 in expanded form?
7,000 + 600 + 0 + 1
Write a numerical expression to represent the following scenario:
Jane divided 12 pencils between herself AND her 3 friends
12 ÷ 4
Which of the following shows the Identity Property of Addition?
a) 6 + 3 = 3 + 6
b) 9 + 0 = 9
c) 5 x 1 = 5
b) 9 + 0 = 9
Which operation would you solve first and WHY?
34 - 4 + 1
Subtraction because in PEMDAS you solve addition and subtraction from left to right (whatever you see first)
Solve:
33
27
Write the following number in expanded form: 78,193
70,000 + 8,000 + 100 + 90 + 3
Solve the following 2 step problem:
Greg's horses eat 6 cans of food a day that weigh 2 pounds each. How many pounds of food do Greg's horses eat in a week?
84 pounds of food
(First, do 6 x 2 = 12. Then, do 12 x 7 = 84).
Which of the following shows the Identity Property of Multiplication?
a) 2 x 1 = 2
b) 2 x 0 = 0
c) 2 + 1 = 3
a) 2 x 1 = 2
Solve using the order of operations:
33 x (4 - 2)
54
Solve:
112
121
Write the following in standard form:
seven hundred fifty thousand, nine hundred twelve
750,912
Write a numerical expression to represent the following scenario (don't solve):
Timmy and Jess put their money together to buy lunch. Timmy has $14 and Jess has $19. They do this same thing every day for a week (7 times).
(14 + 19) x 7
Which property is being shown?
3 x 1 = 1 x 3
Commutative Property of Multiplication
Solve using the order of operations:
80 - (62 x 2)
8
256
What are we showing when we write a number in expanded form?
The true value of each digit
Write a numerical expression to represent the following scenario and solve:
Skylar makes 22 cupcakes and sells 13 at the bake sale. Then, she takes the leftover cupcakes and divides them equally among her 9 classmates. How many cupcakes does each of her classmates get?
Numerical expression: (22 - 13) ÷ 9
Answer: 1