Finding Errors in Solving Equations

Finding Errors in Solving Equations

8th - 9th Grade

13 Qs

quiz-placeholder

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Finding Errors in Solving Equations

Finding Errors in Solving Equations

Assessment

Quiz

Mathematics

8th - 9th Grade

Practice Problem

Hard

CCSS
HSA.REI.A.1, 8.EE.C.7A, 7.EE.B.4A

+1

Standards-aligned

Created by

Barbara White

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13 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 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

2 mins • 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

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

How many solutions does the equation below have?
5 + 2(n + 1) = 2n

Identity
One Solution
No Solution
Two Solutions

Tags

CCSS.8.EE.C.7A

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

How many solutions does the equation below have?
5h - 7 = 5(h - 2) + 3

Identity
No solution
Three Solutions
One Solution

Tags

CCSS.8.EE.C.7A

5.

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

6.

MULTIPLE CHOICE QUESTION

1 min • 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

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Is the solution below correct?
5d = 2d - 18
-2d   -2d
3d = -18
d = 6

Yes
No

Tags

CCSS.7.EE.B.4A

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