- #1
Cheman
- 235
- 1
Why is a x b written as ab? Is it just for the purpose of abbreviation so you don't have to write as much or because the multiplication sign could be mistaken for a letter x?
Thanks.
Thanks.
And [itex]\cdot[/itex] is supposed to be the decimal place and [itex].[/itex] is supposed to be the multiplication symbol, but people just forget out of ease of writting.Muzza said:People are lazy, and it's "a lot" easier to write [tex]ab[/tex] instead of [tex]a \cdot b[/tex] or [tex]a \times b[/tex].
By juxtaposition. In a manuscript found buried in the Earth near the village of Bakhshali, India, and dating to the eighth, ninth, or tenth century, multiplication is normally indicated by placing numbers side-by-side (Cajori vol. 1, page 78).
Multiplication by juxtaposition is also indicated in "some fifteenth-century manuscripts" (Cajori vol. 1, page 250). Juxtaposition was used by al-Qalasadi in the fifteenth century (Cajori vol. 1, page 230).
According to Lucas, Michael Stifel (1487 or 1486 - 1567) first showed multiplication by juxtaposition in 1544 in Arithmetica integra.
In 1553, Michael Stifel brought out a revised edition of Rudolff's Coss, in which he showed multiplication by juxtaposition and repeating a letter to designate powers (Cajori vol. 1, pages 145-147).
No doubt, but it gets an easy laugh out of a class full of students who resent math.Galileo said:I don't think good mathematicians are lazy. Anyone who has ever gotten anywhere must have worked hard for it and I`m sure that's true for all mathematicians in history.
The notation of a x b as ab is derived from the concept of multiplication. When two numbers, a and b, are multiplied together, the result is the product ab. In order to represent this product in a concise and efficient manner, the notation ab was adopted.
Yes, the use of the notation ab is a standard convention that has been adopted by mathematicians and scientists for simplicity and consistency. It is also easier to write and understand, especially when dealing with more complex equations.
No, the order of the variables in multiplication matters. In other words, a x b is not the same as b x a. This is known as the commutative property of multiplication, which states that changing the order of the factors will not change the product.
Yes, depending on the context and field of study, there may be different notations for multiplication. For example, in computer programming, the asterisk symbol (*) is often used to represent multiplication, while in chemistry, a dot (·) is used in place of the x symbol.
The notation ab is useful in mathematics and science because it allows for a concise and standardized representation of multiplication. This makes it easier to write and understand equations, as well as perform calculations and solve problems involving multiplication.