Questions tagged [arithmetic]
The arithmetic tag has no usage guidance.
3
votes
1answer
110 views
How to explain the motivation of parentheses in addition, subtraction and multiplication?
My kid, 5 years old, knows addition, subtraction and multiplication now, of course, in a basic level.
Also he understands that parentheses means "whichever inside shall be computed first".
When I ...
5
votes
1answer
269 views
Concentrations of Adult Math Phobia
Some professions have more math phobia than others. Few engineers hate math, but many teachers and journalists do. This means that university departments of education and journalism would likely have ...
6
votes
0answers
146 views
Adding one to numbers bigger than ten
If someone asks you
Tell me the next number (add one) after the number
one million two hundred thirty-one thousand ninety-nine,
do you known if it is a common error that the first number that ...
8
votes
6answers
231 views
What's the best technique to do math calculations in my head?
I wish to teach myself how to do math calculations–like $99\times 58$ or $2048+1296$ or $506+998$–inside my head.
I know there already exist two methods–Abacus and Vedic Maths. I don't know of more, ...
5
votes
1answer
235 views
Looking for a video about arithmetic disappearing in a few years
I saw a video 3 or 4 years ago.
The video is about the idea that arithmetic will disappear in the future and only will be a sport, like hunting that passed from a need to a sport.
In the video there ...
3
votes
0answers
242 views
Quantifying arthmetical skill
Question for a research project:
What is the standard way of quantifying a student's skill in arithmetic ranging from having to look up numbers on a times-table to computing large sums in their head ...
9
votes
3answers
133 views
Learning operator priorities by drawing trees
As far as I know (and here I am refering to my own math education), operator priorities of $+$, $-$, $\cdot$, $\div$, power and paranthesis are taught via some simple phrases like
"pointy" operators (...
12
votes
1answer
177 views
Do electronic calculators inhibit mathematical thinking?
I am interested in educators real-world experience or being pointed to any research in this area.
I have a student whose arithmetic skills are weak for his/her age. The student counts on his/her ...
5
votes
2answers
150 views
Grading a Simple Rounding Exercise
A student is given the question:
"Round off each of the following numbers, correct to two significant figures.
32.4892
8.2673
475.98
0.078625"
There are two marks for each.
If a student answers ...
11
votes
6answers
1k views
Why does the widespread erroneous definition of “irrational number” persist without being taught?
Among the mathematically ignorant one often finds a mistaken proposed definition of "irrational number", which says that it is a number whose decimal expansion does not terminate or repeat.
The ...
