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Students seem to freak out when their answer is not written exactly the same as the answer provided. This question tries to enforce that (x−y)=−(y−x) and a−bc−d=b−ad−c
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Taxonomy: Kind of activity
Taxonomy: Context
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From users who are members of Algebra :
Ben Brawn
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said | Ready to use | 5 years, 8 months ago |
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Ben Brawn 5 years, 8 months ago
Gave some feedback: Ready to use
Ben Brawn commented 6 years, 8 months ago
Thanks Joshua. I have just removed the extra options so there is only, equivalent and not equivalent.
Joshua Capel commented 6 years, 9 months ago
When the fractions are not equivalent in part (b) they are of the form z=(a-b)/(c-d) and z=(b-a)/(d+c) respectively.
In this case the answer requires the selection of the option "not equivalent! One is the negative of the other.", but this is not true.
I think the option "not equivalent! One is the negative of the other." should be incorrect in both cases (but this will change the number of correct options between the two types of question).
Ben Brawn 7 years, 6 months ago
Published this.Ben Brawn 7 years, 6 months ago
Created this.| Name | Status | Author | Last Modified | |
|---|---|---|---|---|
| Reversed subtraction | Ready to use | Ben Brawn | 26/03/2025 04:23 | |
| Hannah's copy of Reversed subtraction | draft | Hannah Bartholomew | 04/07/2018 13:34 | |
| Hannah's copy of Hannah's copy of Reversed subtraction | draft | Hannah Bartholomew | 11/07/2018 09:41 | |
| Reversed subtraction | draft | heike hoffmann | 14/11/2018 21:10 |
There are 4 other versions that do you not have access to.
| Name | Type | Generated Value |
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| a | integer |
2
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| b | integer |
7
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| c | integer |
10
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| d | integer |
5
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| p | integer |
10
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| q | integer |
2
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| r | integer |
2
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| s | integer |
3
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| sym1 | string |
+
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| sym2 | string |
-
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| seed | integer |
0
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Generated value: integer
- "Part a)" - prompt
- "Part b)" - prompt
- "Part b)" → "Unnamed step" - prompt
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