<![CDATA[Approximations of numbers are no longer equivalent]]>
https://help.geogebra.org/topic/approximations-of-numbers-are-no-longer-equivalent
Thu, 30 Apr 2020 17:16:03 +0000Wed, 29 Apr 2020 23:11:00 +0000Zend_Feed<![CDATA[change expressions like a==b with abs(a-b)<=0.001 ie In older versions of Geogebra, approximations (rounded values) of fractions were equivalent I do not remember this issue]]>
https://help.geogebra.org/topic/approximations-of-numbers-are-no-longer-equivalent#comment-280978
Thu, 30 Apr 2020 09:47:05 +0000<![CDATA[I think it's more likely that there's an error in your logic - I think you can simplify this significantly ch ≟ 0 ∧ r ≟ 1 ∧ d ≟ a_1 ∧ e ≟ a_2 ∨ ch ≟ 0 ∧ r ≟ 2 ∧ d ≟ a_1 ∧ e ≟ a_2 ∨ ch ≟ 0 ∧ r ≟ 1 ∧ e ≟ a_1 ∧ d ≟ a_2 ∨ ch ≟ 0 ∧ r ≟ 1 ∧ e ≟ a_1 ∧ d ≟ a_2 ∨ ch ≟ 0 ∧ r ≟ 3 ∧ g ≟ true
for example define check(x)=abs(ax+b)-c and then correct = check(ans1)==0 && check(ans2)==0]]>
https://help.geogebra.org/topic/approximations-of-numbers-are-no-longer-equivalent#comment-280982
Thu, 30 Apr 2020 10:17:27 +0000<![CDATA[As I said, all of my logic worked fine up until I went back and tested it this week because I was having issues in creating new material. The problem is that if a=1/6 (which it approximates to 0.17) and a student types in b=1/6 (which also gets approximated to 0.17), it does not count a=b as true. This was not an issue in any materials I created before this last week, so I'm assuming it is an error in the update.]]>
https://help.geogebra.org/topic/approximations-of-numbers-are-no-longer-equivalent#comment-281032
Thu, 30 Apr 2020 16:43:48 +0000<![CDATA[Thank you for the idea!! I could go back and change them but I have a lot of applets, so to go back and change every single equality that worked before seems out of line. I use your inequality on new ones, but I would like my older versions to continue to work...]]>
https://help.geogebra.org/topic/approximations-of-numbers-are-no-longer-equivalent#comment-281034
Thu, 30 Apr 2020 16:45:37 +0000<![CDATA[Thanks, I see. That has changed (quite a while ago though). The simplest solution is to change the Input Boxes to the new "Symbolic" ones in Settings -> Algebra https://www.geogebra.org/m/dcek3wcq]]>
https://help.geogebra.org/topic/approximations-of-numbers-are-no-longer-equivalent#comment-281038
Thu, 30 Apr 2020 17:05:19 +0000<![CDATA[Ok, I will try that. Thank you.]]>
https://help.geogebra.org/topic/approximations-of-numbers-are-no-longer-equivalent#comment-281042
Thu, 30 Apr 2020 17:16:03 +0000