Word Problems/Equations
#1
Spiral Review
Word Problems #2
Error Analysis
Bonus (There is one surprise bonus!!!)
100

Solve for a 

7.2 = 0.9a

What is 8?

100

Name this property & simplify.

5(3x + 2)


What is 15x + 10?

100

A retired math teacher takes his grandson shopping. He tells his grandson that they can spend x dollars and 20x = 1,000.20. Which operation does the grandson need to use to find how much money they can spend?

What is Division?

100

Teacher will display Error Analysis Question #1 from Template

The error in this solution is 200 was divided from both sides of the equation. In order to isolate the variable, 8 needs to be divided from both sides. 


A person needs to work 25 hours.

100

A symbol for a number we don't know yet. Usually a letter like x or y.

What is a VARIABLE?

200

x + 1.2 = 4.6

What is 3.4?

200

Simplify

4(7v + 3m)

What is 28v + 12m?

200

Nick wants to buy a skateboard that costs $85.  He has already saved $15.  Which equation represents the amount of money Nick still needs to buy the skateboard?

A.  t - 15 = 85

B.  t + 15 = 85

C.  15 - t = 85

D.  t = 15 + 85

What is 

B.  t + 15 = 85

200

Teacher will display Error Analysis Question #2 from Template

The error in this solution is 112 was subtracted from one side of the equation and added to the other side.

Rick has 113.5 minutes.

200

Operations that undo each other: addition and subtraction, or multiplication and division. (two words)

What is an INVERSE or OPPOSITE OPERATION?

300

Bella Brought stickers to give to 12 of her friends. Each friend received 4 stickers. How many stickers did she bring to school?

Let "s" represent the number of stickers brought to school.

Write the equation & show your work to solve for s.

What is

s/4=12

s=48; She brought 48 stickers to school

300

Write 8^4 in expanded form and solve.

What is

8 x 8 x 8 x 8 = 4,096

300

The Walter's traveled 182 miles in 3  1/2 hours.  The equation 3.5m = 182 can be used to find their mean rate of travel.  What is the value of m?

A.  60

B.  52

C.  50

D.  48

What is

B.  52

182 divided by 3.5 = 52

300

Teacher will display Error Analysis Question #3 from Template

The error in this solution is 30.45 was subtracted from both sides of the equation. The inverse operation for the given equation is addition. 

The skateboard cost $113.75.

300

What are the steps for solving subtraction equations?

What is

1. Identify the variable and operation 

2. Apply the inverse operation (addition) to both sides

5. Solve.

400

Lara and Mae participated in a quiz contest. They scored 23 points in all. If Lara scored 9 points, how many points did Mae score?

Let "p" represent the number of points scored.

Write the equation & show your work to solve for p.

What is

p + 9 = 23; p= 14 points

400

26+2x4/4+4x6-18

What is 40?

400

What is the first step to solve the equation? 

Solve for x. 

3/5 x = 9

What is

Multiply by the reciprocal of 3/5 or multiply both sides by 5/3.

400

Teacher will display Error Analysis Question #4 from Template

An incorrect equation is written. 12 should be subtracted from the number of votes Cynthia received, v.


Cynthia received 27 votes.  


400

What are the steps for solving division equations?

What is

1. Identify the variable and operation.

2. Apply the inverse operation (multiplication) to both sides.

3. Solve.


500

Solve for x

x/0.4=11

What is 4.4?

500

Using the numbers 8, 4, and 2... give an example of the associate property of multiplication.

Answers may vary

What is (2x4)x8 = 2x(4x8)

or 

(8x2)x4=8x(2x4)

500

Robert had money in his savings account. He spent $30 of it on a new jacket. He has $70 left. How much money did he have in his savings before he bought the jacket?

Let "m" represent the amount of money in the savings account.

Write the equation & show your work to solve for m.

What is

m-30=70

m=100; He had $100 in savings


500

Max and some friends shared the cost of a meal. The meal cost $51 and each person contributed $17. How many people shared the cost of the meal? Find the mistake below and give the correct answer.

17x = 51 

-17    -17 

_________

x = 34 

There were 34 people who split the cost of the meal.

What is

the error in the problem is 17 is subtracted from both sides of the equation instead of divided. 

There were 3 people who split the cost of the meal.

500

!!!!BONUS SURPRISE!!!!   !!!2-STEP EQUATION!!! 

This bonus is worth 2 merit badges for each of your team members!

Solve for y.

5y - 11 = 49

What is 

y = 12