Elementary Mathematical Equation
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 This topic has 62 replies, 23 voices, and was last updated 7 months, 2 weeks ago by Always_Ask_Questions.

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April 22, 2023 10:12 pm at 10:12 pm #2182832Always_Ask_QuestionsParticipant
And the lesson is – express yourself carefully – do not use Os for 0s and put parentheses in (2x)/(3y). Mathematicians know that. In Hardy/Littlewood book of math jokes, the professor (Hardy?) writes down an equation:
a x^4 + b x^3 + c x^2 + d x + e (similarly to ax + b, ax^2+bx+c, etc)
and then finds it necessary to add:
when e is any number, not necessarily the ln(1)
and then adds further
although it could take that value.That’s _precision_ of speech.
April 23, 2023 12:03 am at 12:03 am #2182923ujmParticipantAAQ: How would you express the following equation more precisely (or is it simple enough, already)?
33×6+2
April 23, 2023 1:04 pm at 1:04 pm #2183034Reb EliezerParticipant3 – (3 x 6) + 2 = 3 – 18 + 2 = 15 + 2 = 13
April 23, 2023 1:15 pm at 1:15 pm #2183045ytvalumniParticipantR’. Eliezer, addition before subtraction:
3(3*6)+2 = 318+2 = 320 = 17
April 23, 2023 3:29 pm at 3:29 pm #2183067Reb EliezerParticipantI have no idea what you talking about. By the commutative law 3 + 2 – 18 = 5 – 18 = 13
To get 17 it must be (3 – (18 + 2)) = 3 – 18 – 2 = 3 – 20 = 17April 23, 2023 8:22 pm at 8:22 pm #2183230Always_Ask_QuestionsParticipant> 33×6+2
how about this, towarzysz?
+ 2 – 3 x 3 6April 23, 2023 11:44 pm at 11:44 pm #2183240Reb EliezerParticipant2 – 3×36 = 2 – 108 = 106
April 24, 2023 1:16 pm at 1:16 pm #2183330Reb EliezerParticipantYou can also write 3 – 20 = – (20 – 3) = 17
April 24, 2023 1:16 pm at 1:16 pm #2183331Reb EliezerParticipantAlso 2 – (3 X 36) = 2 – 108 = – (108 – 2) = – 106
April 26, 2023 1:08 pm at 1:08 pm #2184386MenoParticipantProblems like this are silly. They’re not math problems, they’re “follow the rules” problems. The rules are arbitrary. Tell me the rules and I’ll give you the answer.
April 26, 2023 1:36 pm at 1:36 pm #2184403ujmParticipantMeno, most math exam questions, whether in elementary school, high school or in university, are “follow the rules” problems.
April 26, 2023 5:29 pm at 5:29 pm #2184496Reb EliezerParticipantThe whole math is based on logical rules that are built on postulates. We cannot prove the existence of Gd without any accepted facts as described in Shaar Yichud of Chovas Halvavos.
Kant points out that it cannot be proven or disproven otherwise we would lose our bechira, free choice.April 26, 2023 10:27 pm at 10:27 pm #2184601Always_Ask_QuestionsParticipant> most math exam questions, whether in elementary school, high school or in university, are “follow the rules” problems.
this is what counts as math in many places, but that is not what math is.
My personal theory is that after Russkies sent Sputnik, US understood that we can lose the technology race to future missiles just with lawyers, so math was immediately introduced at all levels. Unfortunately, Khan Academy was not there yet, so who were the teachers in all these new classes? Same English teachers and unsuccessful lawyers. This generated a huge wave of people hating math teaching children hating math, and this became the mesorah. This is, l’havdil’ what happens when Jewish community grows, b’H so fast that notveryeducated teachers propagate through educational system, leading to higher minimal level, but not much at higher level.

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