Addition
c + 3 = 6
c = 3
v - 3 = 9
v = 6
6r = 18
r = 3
e/7 = 8
e = 56
What is a Variable?
A letter that represents an unknown value.
x + 5 = 11
x = 6
b - 14 = 32
b = 46
8q = 128
q = 16
t/3.2 = 6.25
t = 20
What does an equation have that an expression is missing?
An equal sign.
a + 1/10 = 5/10
Remember to simplify your answer.
a = 2/5
u - 1/4 = 3/4
u = 4/4 = 1
g x 1/2 = 3/16
g = 3/8
y ÷ 2/6 = 2 2/5
y = 4/5
Victoria is baking cookies. She made 4 dozen chocolate chip, which was one sixth of the total dozens she made for a party. How write a division equation and solve to find how many dozen cookies she made in all?
4 dozen = u/6
u = 24
Elliott is 63 inches tall, which is 9 inches taller than his cousin Jackson. Write this problem as an addition equation and solve to find Jackson's height.
9 + x = 63
x = 54 inches
Pete is 15 years old. This is 6 years younger than his sister Victoria. Write and solve a subtraction equation to find Victoria's age.
v - 6 = 15
v = 21
The length of an object in feet is equal to 3 times its length in yards. The length of a water-slide is 48 feet, write and solve a multiplication equation to solve for the water-slides length in yards.
3y = 48
y = 16
Leslie spends $6 a month on snacks at school. That is one fifth of her monthly allowance. Write and solve a division equation to find out what her total monthly allowance is.
a/5 = 6
a = $30
What holiday did we celebrate that got us out of school yesterday?
Martin Luther King Jr. Day.
The average length of a King Cobra is 118 inches, which is 22 inches longer than the Black Mamba. Write and solve an addition equation to find the average length of a Black Mamba.
118 = 22 + b
b = 96
North Carolina has 15 electoral votes, which is 12 less electoral votes than Florida. Write and solve a subtraction equation to find the number of electoral votes Florida has.
f - 12 = 15
f = 27
The total time to burn a CD is 18 minutes. Last weekend, Molly spent 90 minutes burning CDs. Write and solve a multiplication equation to fine the number of CDs she burned.
18c = 90
c = 5
Allison is baking a pie. She wants 4.5 strawberries in each serving for 8 people. Write and solve a division equation to find hour many strawberries Allison will need.
s/4.5 = 8
s = 36
Tammy and Freda are traveling 40 miles per hour on a train that is traveling 252 miles so that they can visit their grandmother. During the trip, both girls ate two apples a piece. It took them 6 hours on the train to arrive, and another 30 minutes for their ride to take them to their grandmother's house. On this long trip, how many apples did the girls eat?
4 apples.