First Steps
What is the value of n + 12 = 37
n = 25
Solve for x.
x + 8 = 10
x = 2
Inverse operation of addition
What is subtraction?
Airboats are a popular way to tour areas with shallow water. A small airboat can fit 6 people. A large airboat can fit 4 times as many people. How many more people can fit in a large airboat than in a small airboat?
Create an equation and solve.
6 × 4 = n
24 = n
24 people can fit in a large airboat.
There are 16 family members renting vans. Each van holds 8 people. Renting a van costs $50.
What is the total cost of renting the vans?
16/8 = n
2 = n
2 x 50 = n
100 = n
$100
What is the value of x?
5 * x = 20
x = 4
Solve for n.
5 x n = 20
n = 4
Inverse operation of multiplication
What is division?
Four children in the Vazquez family went to the camp. Each packed 6 T-shirts. Together, their clothes fit into 2 large duffel bags. If an equal number of T-shirts were in each duffel bag, how many T-shirts were in each duffel bag?
4 x 6 = n
n = 24
24/2 = n
12 = n
12 shirts in each
There are 12 players on a basketball team. They are divided into groups of 4 for practice. Each group does 5 different drills. How many drills are done?
12/4 = n
3 = n
3 x 5 = n
15 = n
15 drills
What is the value of x?
x/8 = 32
x = 32
Solve for x.
x/8 = 2
x = 16
Inverse operation of subtraction
What is addition
Transportation to the camp is offered from a local school. There are 27 campers traveling by van. Each van can hold 9 campers. The camp pays $60 for each van. What is the total cost of the vans?
27/9 = n
3 = n
3 x 60 = n
180 = n
$180
Solve for n.
7 x n = 49
n = 7
What is the value of x?
22 + x = 73
x = 51
Solve for x.
10 + x = 60
x = 50
Inverse operation of division
What is multiplication?
Each cabin has 6 bunks on the left and 6 bunks on the right. If there are 9 cabins, how many bunks are there in all?
6 x 2 = n
12 = n
9 x 12 = n
108 = n
108 bunks
Solve for n.
300/10 = n
x = 30
What is the value of x?
24/x = 8
x= 3
Solve for x.
x + 4 = 8
x = 8
Define Inverse operation
What is operations that are the opposite of each other. Operations that undo each other.
Addition and Subtraction
Multiplication and Division
Twenty campers want to go kayaking. Each kayak holds 2 people. There are only 4 kayaks, so the campers will need to go in one-hour shifts.
How many shifts will be needed for all campers to kayak?
4 kayaks x 2 people = n
8 = n
20 campers/8 campers = n
2.5 = n
There will need to be 3 shifts (round 2.5 up to 3).
Solve for n.
6 x n = 42
n =42