We are going to be simplifying radicals and was curious to know if there is a way using the computation layer to do self-checking with radicals. I have seen how to do it with numerical values and with ordered pairs (Joce Dagenais has an intro to self checking using CL activity that I’ve looked thro…

Fairly easy (maybe not simple) if you aren’t randomizing anything. So \sqrt{48} for example: In the math input CL: check= this.numericValue<=6.93 and this.numericValue>6.92 and countNumberUsage(this.latex,4)=1 and countNumberUsage(this.latex,3)=1 correct: check First line checks that it’s the co…

This was posted in another thread. Does that help? [image] How can I parse fractions in student input? Questions I extended the fraction parse, and added a screen with components to simplify radicals (pulling out perfect squares). I saw several questions about this in ot…

I will check this out–thank you… I’m very limited in my coding abilities, so words like “parse” freak me out a little. :slight_smile:

Basically, means splitting into parts. So, “parsing a fraction” was identifying the numerator and denominator, and for a radical, identifying the coefficient and radicand.

This is a great tool, but not exactly what I’m looking for. What I’d like to be able to do is give them a radical (sometimes in fraction form so they learn to rationalize the denominator as well) and then want to be able to give them feedback on whether their answer was correct or not. Here’s the li…

Thank you so much! I will give this a try. I appreciate your help and explanations. Just to clarify–if I were asking them to simplify sqrt 63, the second line of the CL text would be: and countNumberUsage(this.latex,3)=1 and countNumberUsage(this.latex,7)=1

Yes. And if you’ve got repeat values say sqrt 8 countNumberUsage(this.latex,2)=2

And if it was sqrt 88…what then???

It’s searching for numbers not digits, so: and countNumberUsage(this.latex,2)=1 and countNumberUsage(this.latex,22)=1 Also, countNumberUsage only takes positive parameters, so the above would accept both, 2sqrt22 and -2sqrt22, but the ambiguity should get handled with the decimal check.

This is so helpful–thank you so much! I love CL but have absolutely no background in coding and I’m an old fart, so I’m really trying and I appreciate people like you (and others in this forum) being willing to help people like me!

If I could ask one more question… If I were trying to have them rationalize something like 5/sqrt 3, how would the second line of coding look? and countNumberUsage(this.latex,2)=1 and countNumberUsage(this.latex,22)=1 Do I have to tell it to look for certain numbers in the numerator and the denomi…

Self-checking with radicals

Questions

Daniel_Grubbs January 7, 2021, 5:16pm 2

This was posted in another thread. Does that help?

Topic		Replies	Views
CL for entering an answer in a simplified square root. Ex. sqrt(13) Questions	8	230	February 27, 2025
Marking Answers Correct in Simplest Radical Form Questions	3	557	September 23, 2022
Activity on Simplifying Radicals Discussion	0	2734	March 2, 2020
Self Check 6+3sqrt2? Questions	11	872	September 10, 2024
Student enters sqrt in table, want to autocheck Questions	4	391	March 13, 2024

Self-checking with radicals

Related topics