TERMINOLOGY
What is the difference between an expression and an equation?
An expression does not have a solution or equal sign, whereas an equation has an equal sign and an answer.
x + 6
x+3= 4
x = 1
2x + 5 = 11
x = 3
Paige found 98 seashells and 34 starfishes on the
beach. She gave Avery some of her seashells.
She has 39 seashells left. How many seashells did
she give to Avery?
93 shells
What is a variable?
A variable is a letter that is used to represent a number.
The quotient of a number and nine.
x/9
m - 5 = 5
m = 10
e/6 - 5 = 2
e = 42
The store has CD's and DVD's that you need.
How many packs of DVD's can you buy
with one hundred eighty dollars if one pack
costs twelve dollars?
15 packs
What is a term?
Terms are separated by addition or subtraction signs.
The product of four and a number is 8
4x = 8
6h = 42
h = 7
8 + 4r = 16
r = 2
Riley and Ella found some money in
an envelope. They split the money evenly, each
getting $25. How much money did they find?
They found $50
What is a constant?
A constant is the number that is being added to the variable.
Two less than the product of seven and a number is nine
7x-2= 9
r/5=6
r = 30
3 = y/3 - 2
y = 15
Lincoln had forty - two peaches and thirty - three
ears at his roadside fruit stand. At the end of the
day he had fourteen peaches left. How many
peaches did he sell?
28 peaches
What is a numerical coefficient?
A numerical coefficient is the number that the variable is being multiplied by.
Take away 5 from the quotient of a number and four to get twelve.
x/4-5=12
g = -4
-9 = 2c-13
c=2
How many ink cartridges can you buy with $170 if one cartridge costs 17 dollars?
10 cartridges