Addition Equations
Solve the equation.
x + 5 = 11
What is the inverse operation of subtraction?
Addition
What is the inverse operation of multiplication?
Division
What is the inverse operation of division?
Multiplication
Which expression is equal to 48 + 72?
A. 24(2 + 3)
B. 8(6 + 12)
C. 3(14 + 24)
D. 2(24 + 38)
A. 24(2 + 3)
Solve the equation.
t + 8/10 = 9/10
t = 1/10
4.6 = e - 3.2
7.8
Solve the equation.
4g = 24
6
Solve the equation.
17 = w/6
102
Which expression is equivalent to 25x – 10y?
A. 5(5x – 2y)
B. 5(5x – 10y)
C. 5(20x – 5y)
D. 5(20x – 10y)
A. 5(5x -2y)
Solve the equation.
Eliott is 63 inches tall, which is 9 inches taller than his cousin, Jackson. Write and solve an addition equation to find Jackson's height.
9 + x = 63; 54 inches
Solve the equation.
n - 1/4 = 3/4
1 or 4/4
Solve the equation.
2.5y = 5
2
Sophia is buying party favors. She has a budget of $2.75 a person for 6 people. How much can Sophia spend on party favors?
f/2.75 = 6; $16.50
Tonya pays $300 each month to rent an office where she earns $25 per hour tutoring students. Which equation represents Tonya’s profit, y, for working
x hours?
A. y = 25 + 300x
B. y = 25x + 300
C. y = 25 – 300x
D. y = 25x – 300
D. y = 25x - 300
Find the error:
Melody is solving the equation x + 12 = 31. Find her mistake and correct it.
x + 12 = 31
+ 12 = + 12
x = 43
She should have subtracted 12 from each side; the answer is 19.
A CD costs $14.95. This is $7.55 less than the cost of a DVD. Write and solve a subtraction equation to find the cost of the DVD.
d - 7.55 = 14.95; $22.50
A jewelry store is selling a set of 4 pairs of gemstone earrings for $58, including tax. Neva and three of her friends want to buy the set so each could have one pair of earrings. Write and solve a multiplication equation to find how much each person should pay.
4e = 58; $14.50
Solve the equation.
c/0.2 = 7
1.4
Jason owns a party supply store.
He sells balloons for $0.50 each and party hats for $1.25 each.
Jason buys each balloon for $0.10 and each party hat for $0.20.
Which expression represents how much money Jason gains from selling n balloons and h party hats?
A 0.40n + 1.05h
B 0.60n + 1.45h
C 1.75nh
D 1.45h – 0.60n
A. 0.40n + 1.05h
Suppose Julie has already earned 36 points. She needs 50 points to win. Write and solve an addition equation to find the number of points she still needs to win the pizza party.
36 + p = 50; 14 points
Elisa explained to solve the equation d - 6 = 4 that you must subtract 6 from both sides.
Is she correct? If she is incorrect, please correct her mistake.
Elisa did not perform the inverse operation. You must add 6 to each side to undo subtracting 6.
Solve the equation.
2/5g = 3/5
1 and 1/2
Blake is cutting a piece of rope into fourths. If each piece is 16 inches long, what is the length of the entire rope?
r/4 = 16; 64 in.
Sam is using the expression m/8n in class. What is the value of the expression when m = 4 and n = 1/2 ?
1