Property of Equality
Which property of equality is being represented?
2x = 26
2x + 7 = 26 + 7
Addition Property of Equality (APE)
2 + x = 27
x = 25
18m = 90
m= 5
0.2x = 12.8
x=64
How many kids does Ms. Lizzie have?
About 48 depending on who is absent ;)
Which property of equality is being represented?
9 + w = 31
(9 + w) x 2 = 31 x 2
Multiplication Property of Equality (MPE)
w = 164
125 ÷ x = 25
x = 5
5/7 - b = 2/9
b = 31/63
What is the difference between an equation and an expression?
An equation has an equal sign, and expression does not.
Which property of equality is being represented?
21 - q = 15
(21 - q) ÷ 3 = 15 ÷ 3
Division Property of Equality (DPE)
164 + d = 190
d = 36
3b = 123
b = 41
18.9 + f = 156.81
f = 137.91
What teacher does Ms. Lizzie's sister para for, and what is her name?
Mr. Banner, Ms. Hannah
4j = 190
4j - 16 = 190 - 16
Subtraction Property of Equality (SPE)
197 - k = 20
k = 177
221 ÷ y = 13
y = 17
2/3 ÷ h = 4/5
h = 5/6
What is a variable?
A letter in an expression or equation that represents and unknown value
Apply any property of equality to the below equation, and label which one you are using.
5w + 4 = 178
Answers may vary
Which value of the variable makes the equation true?189 + v = 210
v = 38, 41, 17, 21
v = 21
Which value of the variable makes the equation true?13v = 767
v = 49, 55, 59, 61
v = 59
23.4 - u = 15.8
u = 7.6
How old is Ms. Lizzie?
24 years old