Why did he make such an obvious
arithmetic mistake?
Today,
arithmetic mistakes are no longer a major issue (although data entry errors still are).
Not exact matches
Judea Pearl likes to distinguish between «Simpson's reversal», which is the indisputable
arithmetic fact that, say, 2/3 + 5/9 is not equal to 7/12, and «Simpson's surprise», which is the
mistaken causal interpretation of this fact (that's the paradox part.)
The first
mistake seemingly always made by studios looking to make the Great American Video Game Movie is choosing a game to adapt by the financially safe
arithmetic of «biggest built - in audience plus largest potential explosions equals box office gold.»
Wilson notes the dramatic withdrawal from
arithmetic in the elementary grades that has occurred over the past two to three decades, reflecting the
mistaken but increasingly popular view that learning whole number operations (such as the multiplication tables) to the point of instant recall is bad for a student, not necessary to higher math, and impedes students» ability to understand mathematical principles.
Partly because when kids make
mistakes, the most obvious
mistakes concern the pieces —
arithmetic errors, misspellings, facts not remembered.
These
mistakes can be traced back to students» inadequate and improper understanding of basic
arithmetic operations.
Arithmetic fluency is vital for students, so drill it into your class that they need to clearly show their working in their answers, paying close attention to misapplied methods or
mistakes as they do so.
I had returns prepared by solo working advisers where I found
mistakes as ridiculous as
arithmetic calculation errors (fired after two seasons), and by big - 4 firms where I found
mistakes that cost me quite a lot (although by the time I figured that they cost me significant amounts, it was too late to sue or change; fired after 2 seasons as well).
Then I keep enough money in my checking account to, (a) Cover any bills until the next paycheck and allow for the particularly large bills; and (b) provide some cushion in case I make a
mistake — forget to record a check or make an
arithmetic error or whatever; and (c) provide some cushion for short - term unexpected expenses.
They make the rookie
mistake of describing the calculation of long - term investment returns as a
arithmetic mean (Page 16).