Multi-Step Equations Error Analysis

Flashcard
•
Mathematics
•
8th - 9th Grade
•
Hard
Mark Kemer
FREE Resource
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10 questions
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1.
FLASHCARD QUESTION
Front
Find the error in the problem:
19 - 2k = 3k - 1
+3k +3k
19 + 1k = -1
-19 -19
k = -20
Back
Instead of adding 3k they should subtract 3k
2.
FLASHCARD QUESTION
Front
Find the error in the student's solution: 1/5x + 6 = 3/5x + 5
1x + 6 = 3x + 5
-2x + 6 = 5
-2x = -1
x = 1/2
Back
The student did not multiply all terms by the common denominator
3.
FLASHCARD QUESTION
Front
How many solutions does the equation 5 + 2(n + 1) = 2n have?
Back
No Solution
4.
FLASHCARD QUESTION
Front
How many solutions does the equation below have?
5h - 7 = 5(h - 2) + 3
Back
Identity
5.
FLASHCARD QUESTION
Front
How many solutions does the equation 6(3a +1) - 30 = 3(2a - 4) have?
Back
One Solution
6.
FLASHCARD QUESTION
Front
Is the solution below correct?
5d = 2d - 18
-2d -2d
3d = -18
d = 6
Back
No
7.
FLASHCARD QUESTION
Front
Is the solution below correct?
-6z + 13 = 7z
+6z +6z
13 = 13z
z = 1
Back
Yes
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