Vocabulary
A letter or symbol that represents a number
What is a variable
8 = 4w
w=2
y/5 = 4
y = 20
the goal of solving an equation (starts with an "i")
What is isolate the variable
15y = 120
y = 8
12 = z/4
z = 48
Parts of an equation put together with operation symbols
For exampe:
2n, 5, x, 15, or 7b
What is a term
6 (r + 11)
6r + 66
d/3 = 12
d =36
a math sentence containing = that shows two quantities are equal
What is an equation
Alyssa has a temperature that is 3 degrees higher than normal. If Alyssa's temperature is 101 degrees F, what is a normal temperature?
x + 3 = 101
x = 98 degrees
A normal temperature is 98 degrees F
Clara has $67 in her piggy bank. She spends x dollars on a dog bowl which leaves her with $57.40.
How many dollars did she spend?
67 - x = 57.40
x = 9.60
She spent $9.60
Millipedes have 4 legs per segment.
The recorded number of legs on a millipede is 752. How many segments did this millipede have?
4x = 752
x = 188
The millipede has 188 segments.
Maria baked x cookies. She distributed the cookies equally among six of her neighbors. Each neighbor received 18 cookies. How many cookies did Maria start with?
x/6 = 18
x = 108
Maria started with 108 cookies.
value for a variable that makes and equation true
What is a solution
James had some marbles in a bag. He got 8 marbles from a friend. He now has 14 marbles.
Write and solve an addition equation to find how many marbles James started with.
m + 8 = 14
m = 6
James started with 6 marbles.
Sally has 5 times as many videos as Mark.
Sally has 50 videos. Write and solve an equation to find how many videos Mark has.
5v = 50
v = 10
Mark has 10 videos.
The Empire State Building is 381 m tall. The Empire State Building could fit across the Grand Canyon 75 times.
Write and solve and equation to find the width of the Grand Canyon.
w/381 = 76
w = 28,956m
The Grand Canyon is 28,956 m wide