By the way, my daughter's title in the Secretary of Public Education
Office is Financial Technician. I can multiply two 2 digit numbers
mentally pretty fast.
Frank
I so know the massive slowdown when I go from 2-3 digits (even 2x3)
multiplication... it goes from something mostly intuitive and barely
notational to worse than 50/50 and then acutely beyond if I go to more
digits, though not linear with quantity, superlinear with exponent/digits.
---
Frank C. Wimberly
140 Calle Ojo Feliz,
Santa Fe, NM 87505
505 670-9918
Santa Fe, NM
On Thu, Aug 8, 2024, 7:11 AM Edward Angel <an...@cs.unm.edu> wrote:
The following is hard to believe but true.
Last weekend, I was in line at Walgreens. The older woman in front
of me gave the cashier a $20 bill for a $13.54 purchase. The young
cashier was completely unable to figure out the correct change.
After a couple of failed tries, the older woman tried to teach the
cashier how to subtract $13.54 from $20 but that was a failure.
She then tried to get the casher to add to $13.54 until the
cashier reach $20. When that failed, she helped the cashier add
small change and dollars until she got to $6.46.
I don’t think giving everyone a calculator is the solution.
Ed
_______________________
Ed Angel
Founding Director, Art, Research, Technology and Science
Laboratory (ARTS Lab)
Professor Emeritus of Computer Science, University of New Mexico
<https://www.google.com/maps/search/New+Mexico+1017+Sierra+Pinon+Santa+Fe,+NM+87501?entry=gmail&source=g>
1017 Sierra Pinon
<https://www.google.com/maps/search/New+Mexico+1017+Sierra+Pinon+Santa+Fe,+NM+87501?entry=gmail&source=g>
Santa Fe, NM 87501
<https://www.google.com/maps/search/New+Mexico+1017+Sierra+Pinon+Santa+Fe,+NM+87501?entry=gmail&source=g>
505-984-0136 (home)an...@cs.unm.edu
505-453-4944 (cell) http://www.cs.unm.edu/~angel
On Aug 7, 2024, at 9:28 PM, Frank Wimberly <wimber...@gmail.com>
wrote:
I'm not sure my 30+ year old daughter knows the times tables.
She works for the Secretary of Public Education. If you ask her
about it she will say she uses calculators and spreadsheets. I think.
---
Frank C. Wimberly
140 Calle Ojo Feliz,
<https://www.google.com/maps/search/140+Calle+Ojo+Feliz,++Santa+Fe,+NM+87505?entry=gmail&source=g>
Santa Fe, NM 87505
<https://www.google.com/maps/search/140+Calle+Ojo+Feliz,++Santa+Fe,+NM+87505?entry=gmail&source=g>
505 670-9918
Santa Fe, NM
On Wed, Aug 7, 2024, 9:12 PM Russell Standish
<li...@hpcoders.com.au> wrote:
It is a test that you know your 7 or 8 times table. And the
definition
of a prime number (which could be given as part of the
question, if
not the curriculum).
I would expect most 9 or 10 years olds should know their
times tables.
Or am I wrong abut kids these days?
On Mon, Jul 22, 2024 at 12:43:54PM -0600, Tom Johnson wrote:
> Ms. O'Hara:
>
> RE your story Sunday, "Does proficiency give full picture?"
> From your lede:
> "Pop quiz: What number is both a prime number and a factor
or 56"?
>
> If I understand correctly, this is a question on an exam
given to fourth
> graders, 9- or 10-year-olds.
> Could you please point me to some source in the city or
state education
> departments who can tell me what short- or long-term value
this question about
> mathematics -- NOT arithmetic -- has for students that age?
>
> We live in a state where it is a rare cashier who can do
the mental
> arithmetic to make change from a $20 bill. Can we first
find out if fourth
> graders can do that before getting into primes and factorials?
> *--
> ============================================
> Tom Johnson - t...@jtjohnson.com
> Institute for Analytic Journalism -- Santa Fe, NM USA
> 505.577.6482(c) 505.473.9646(h)
> Visit Global Santa Fe
> ============================================
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