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Error Analysis in Solving Equations

Authored by Anthony Clark

Mathematics

9th Grade

CCSS covered

Used 2+ times

Error Analysis in Solving Equations
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10 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

What is the error?

Adding 1 to both sides

Distributing the negative sign when multiplying –3(x + 2)

Subtracting 6 from both sides

x should equal 5/3

Tags

CCSS.HSA.REI.A.1

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

How many solutions are there?

one solution

no solution

infinite solutions

none of these

Tags

CCSS.8.EE.C.7A

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

"I know that No Solution is correct because when solved the left side of the equation is ___________ the right side of the equation."

the same as

a number different than

a variable equal to a constant on

Tags

CCSS.8.EE.C.7A

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

"I know that Infinite Solution is correct because when solved the left side of the equation is ___________ the right side of the equation."

the same as

a number different than

a variable equal to a constant on

Tags

CCSS.8.EE.C.7A

5.

MULTIPLE SELECT QUESTION

1 min • 1 pt

Media Image

What error(s) did this student make?

Did not combine like terms

Needed to add 2x instead of subtract

Should not use inverse operations on the same side of the equal sign

No errors; the student is correct

Tags

CCSS.HSA.REI.A.1

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

This student made an error with the disruptive property. What did s/he do wrong?

You can't drop down a -16; You need to keep it positive

You should only multiply the -2 & 8m; the 8 should stay the same

You need to multiply -2 to both parts inside the parenthesis; -2*8m is -16m and -2*8 is -16

You should divide -2 from both sides first

Tags

CCSS.HSA.REI.A.1

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

This student subtracted 2 from both sides of the equation. What should s/he have done?

Nothing; This is correct

S/He should have added a -2 to both sides

S/He should have added 2 to both sides

Subtracted 2x instead of 2

Tags

CCSS.HSA.REI.A.1

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