Addition Equations
The inverse of addition.
What is Subtraction?
The inverse of Subtraction.
What is Addition?
The inverse of multiplication.
What is Division?
The inverse of division.
What is Multiplication?
Write an equation to model the word problem.
Jenny wants to buy an MP3 player that costs $30.98. How much change does she receive if she gives the cashier $40?
30.98 + x = 40
x + 5 = 14
x = 9
x - 5 = 8
x = 13
x = 6
x/2 = 5
x = 10
Write an equation to model the word problem and solve.
How many boxes of envelopes can you buy with $12 if one box costs $3?
3x = 12
x = 4
32 = 15 + x
x = 17
12 = x - 2
x = 14
14x = 84
x = 6
x/12 = 4
x = 48
Write an equation to model the word problem.
Last Friday Trevon had $29. Over the weekend he received some money for cleaning the attic. He now has $41. How much money did he receive?
29 + x = 41
-10 + x = -6 + 2
x = 6
x - 6 + 12 = 17
x = 11
-10x + x = 27
x = -3
x/6 = -4
x = -24
Write an equation to model the word problem.
How many packages of diapers can you buy with $40 if one package costs $8?
8x = 40
x = 5
-7 + 9 + x = -4 - 2
x = -8
x - 4 = -6 - 10
x = -12
-3x - 5x = -70 + 6
x = 8
x/-9 = -5 - 2
x = 63
Write an equation to model the word problem and solve.
At a restaurant, Mike and his three friends decided to divide the bill evenly. If each person paid $13 then what was the total bill?
x/3 = 13
OR x/13 = 3
x = 39