Error Analysis Algebra Review (Geometry C)

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

What mistake, if any, did this student make?

• S/He needed to subtract 3x from both sides

• S/He needed to drop down a +2 instead of a -2

• S/He did not divide correctly

• No mistakes; x=2 is correct

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

Did this student solve the problem correctly? Type YES or NO

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

What type of mistake did this student make?

• The student did not use the correct inverse operations

• The student did not add/subtract negative numbers correctly

• There are no mistakes

Which of the following correctly identifies the mistake this student made?

• There are no mistakes

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This student's mistake is circled in yellow. What should s/he put here.

This answer is wrong. What is the correct answer?

Tell us where you are at with solving equations.

• I feel great; Wait until you see my quiz score today!

• I feel pretty good; My score will be okay but I need more practice

• I'm not sure I'll ever get this stuff

• With a little more effort, I think I will be fine