Equations
Expressions and Variables
Solving Equations
Formulas
Addition Properties
100
Write an equation- Explain what the variable represents Gavin wants to read 65 books this year. He has already read 27 books. How many more should he read?
65= 27 +b 65-27=b b= books wanting to read b=38
100
Thomas had 7 books, he bought 8 more. Write the expression
7+8
100
23+n=30
n=7
100
A rectangle has a length of 12 units and width of 15 units. What formula would you use and what is the perimeter?
P=a+b+c+d or P=a+a+b+b P=54
100
Name the addition property (3+1)+6=3+(1+6)
Associative
200
Write an equation- Explain what the variable represents Shannen saw 31 animals at the pet store. 16 were cats, and three were rabbits. How many other kinds of animals did she see?
32= (16 + 3) + a 32=19 +a 32-19= a a= other animals seen a=13
200
Skyla picked 34 oranges. She ate some. How many did she eat? Write the expression and tell what the variable represents.
34 - o o= oranges ate
200
15-n=8
n=7
200
Find the perimeter of a triangle. The sides measure 7 feet, 8 feet, and 4 feet. What formula would you use and what is the perimeter?
P= a + b + c P= 7 + 8 + 4 P= 19 feet
200
Name the addition property 12+4=4+12
Commutative
300
Write an equation- Explain what the variable represents There were 33 students in Mrs. Parker's math class. After 12 students left and 15 new students joined, how many were in the math class?
33 - 12 + 15= s s= students in math class s=36
300
John ate 6 of the 25 cookies, and then made some more. How many did he make? Write the expression, and tell what the variable represents
25-6+c c= cookies made
300
n-16=9
n=25
300
Viviana's bedroom is 12 feet long and 23 feet wide. How much paper is needed to make a border around the entire bedroom? What formula would you use and what is the perimeter?
P= a+b+c+d P=a+a+b+b P=12+23+12+23 P=70 feet
300
Name the addition property 427+0=427
Zero Property
400
Write an equation- Explain what the variable represents The theater group performed on Friday and Saturday nights. Four hundred fifty-two attended on Friday, and forty-seven more attended on Saturday. How many people saw the show?
a= 452 +(452+47) a= 452 +499 a= 951 a= attendees
400
Trinity rode up 8 floors and then rode down 5. What floor did she start at? Write the expression, tell what the variable represents
f + 8 - 5 f= floor started at
400
(n-5)+8=23
n=20
400
Gabriel walks a total of 3 miles a day. He walks a total of 5 days per week. What equation would you use to show this.
3 x 5=n
400
Name the addition property, find the value of n 48 + (69 + 58)= (48 + n ) +58
Associative n=69
500
Write an equation- Explain what the variable represents Savannah had fifteen craze-erasers, then Isabell gave her more and she gave three away. Now she has ten. How many did Isabell give Savannah?
15= 5 + e - 3 e= craze erasers given e= 13
500
Find the value of the expression t + 156 if t is 358
514
500
11+(7+n)= 24
n=6
500
The perimeter of a pentagon is 104 yards. The sides measure 12 yards, 10 yards, 21 yards, 40 yards, and n yards. What is the measurement of the fifth side? What is the formula you would use and what does n equal?
P= a+b+c+d+e 104=12+10+21+40+n 104=83+n n=21 yards
500
Name the addition property, find the value of n 158,125 + 0 = n
Zero Property n= 158,125
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