Search Header Logo

Error Analysis

Authored by Andrew McCandless

Mathematics

7th - 9th Grade

CCSS covered

Used 40+ times

Error Analysis
AI

AI Actions

Add similar questions

Adjust reading levels

Convert to real-world scenario

Translate activity

More...

    Content View

    Student View

6 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Find the error in the problem below
19 - 2k = 3k - 1
     +3k   +3k
19 + 1k = -1
-19           -19
k = -20

They should have divided by 1 for the last step
They should add 19 instead of subtracting 19
I can not find an error
Instead of adding 3k they should subtract 3k

Tags

CCSS.HSA.REI.A.1

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Find the Error
What error did the student make when solving the equation:
1/5x + 6 = 3/5x + 5
1x + 6 = 3x + 5
-2x + 6 = 5
-2x = -1
x = 1/2

The student found an incorrect common denominator
The student did not multiply all terms by the common denominator
The student did not use opposite operations appropriately
The student did not correctly eliminate the variable from one side of the equation

Tags

CCSS.HSA.REI.A.1

CCSS.HSA.REI.B.3

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

5 + 2(n + 1) = 2n
Bill says the first step is to add and get
7(n + 1) = 2n

Bill is correct
Bill is wrong; he should have distributed the 2 first.
Bill is wrong; he should have subtracted 5 from both sides first.
Bill is wrong; he should have divided by 2 firat.

Tags

CCSS.8.EE.C.7B

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

How many solutions does the equation below have?
6(3a +1) - 30 = 3(2a - 4)

Identity
No Solution
Three Solutions
One Solution

Tags

CCSS.8.EE.C.7A

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Where was the mistake made?
           5d  =    2d - 18
-2d        -2d
3d =     -18
d = 6

Subtracted 2d instead of adding
Should have gotten -6 when dividing -18 by 3
Should have added 18 to both sides first
Should have subtracted 5d from both sides first

Tags

CCSS.HSA.REI.A.1

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

1/2(8x-12)=x-2
4x-6=x-2
5x-6=-2
5x=4
x=4/5

The first step is wrong; they should have divided both sides by 2.
The second step is wrong; they should have subtracted x from both sides.
The third step is wrong; they should have subtracted 6 from both sides.
The last step is wrong; they should have multiplied both sides by 5.

Tags

CCSS.8.EE.C.7B

Access all questions and much more by creating a free account

Create resources

Host any resource

Get auto-graded reports

Google

Continue with Google

Email

Continue with Email

Classlink

Continue with Classlink

Clever

Continue with Clever

or continue with

Microsoft

Microsoft

Apple

Apple

Others

Others

Already have an account?