1. Maths symbols I_ Arithmetic symbols II_ Plus and minus
III_ Multiplication
IV_ Symbols of Logic
V_ Union and Intersection

2. Time line of mathematics symbols
a*b for a x b
and a ÷ b by Rahn
ab for multiplication
1460
1631
1698
+ and – (addition and substraction) by Widmann
+ and – (signs) and a x b by Oughtred
1659
1544
a.b for a x b and a:b for a ÷ b by Leibniz

3. Arithmetic symbols
By Eda Bayrak and Ezgi Koçal…

4. Arithmetic Symbols
Arithmetic is the oldest and most elementary branch of mathematics, used by almost everyone, for tasks ranging from simple day-to-day counting to advanced science and business calculations.

5. By Charlotte and Célia…
Plus and minus
By Charlotte and Célia…

6. + & -
The plus and minus signs (+ and -) are mathematical symbols used to represent the notions of positive and negative as well as the operations of addition and subtraction.

7. History Johannes Widmann François Viete Robert Recorde 1460-1498

8. but also for negative and positive numbers.
And from these dates, plus and minus are used for all additions and substractions
but also for negative and positive numbers.
a-b=c
-b+a=c

9. By Eda Bayrak and Ezgi Koçal…
Multiplication
By Eda Bayrak and Ezgi Koçal…

10. Multiplication is the third basic operation of arithmetic.
‘’ a × b or a • b or a * b ‘’ All of them are same meaning.

11. Johann Rahn (1622-1676) William Oughtred (1574 –1660)
Gottfried Wilhelm Leibniz
( )
Johann Rahn ( )

12. History of Multiplication
Methods of multiplication were documented in the 
Egyptian, 
Greek, 
Indian  
Chinese
civilizations.

13. By Münire Büyükgüllü, Sümeyye Nur Azman, Rita Barrocas…
Symbols of Logic
By Münire Büyükgüllü, Sümeyye Nur Azman, Rita Barrocas…

14. -LOGIC-
Math's logic is considered the science of reasoning and demonstration. Logic is especially important in mathematics and philosophy, but it is also used on our daily routine without even noticing.

15. History of Logical Symbols
George Boole

16. A simple statement is one that does not contain any other statement as a part. We will use the lower-case letters, p, q, r, ..., as symbols for simple statements.
Simple statements :
p ‘’p is true’’ assertion
~p ‘’p is false’’ negation
Ex.: p: Sun is a star ( T ) ~p: Sun isn’t a star ( F )
In conclusion two denies equals to an affirmation. Ex: ~(~p) = p .

17. A truth table is a complete list of the possible truth values of a statement.
A truth table is a mathematical table used in logic specifically in connection with Boolean algebra, boolean functions, and propositional calculus. .

18. Compounds and connectives :

19. Union and Intersection
By Begüm Sarıdede and Şeyma Edizarslan…

20. George Cantor
John Venn

21. VENN DIAGRAMS

22. UNION
The union of two sets is the set of elements which are in either set.
Examples: {1, 2} ∪ {red, purple} ={1, 2, red, purple} {1, 2, green} ∪ {red, purple, green} ={1, 2, red, purple, green} {1, 2} ∪ {1, 2} = {1, 2}
For Example:
A=(1,2,3) and B=(3,4,5) AUB=(1,2,3,4,5)

23. INTERSECTION
The intersection of two sets is the set of elements which are in both sets.
Examples:
{1, 2} ∩ {red, purple} = ∅
{1, 2, green} ∩ {red, purple, green} = {green}
{1, 2} ∩ {1, 2} = {1, 2}
For Example:
A=(1,2,3) and B=(3,4,5) A∩B=(3)

24. You can have more information about Arithmetic Symbols in :
Plus and minus made by Charlotte Laurent and Célia Lopes- Bernier
Multiplication and Arithmetics Symbols made by Eda Bayrak and Ezgi Koçal.
Symbol of Logic made by Münire Büyükgüllü, Sümeyye Nur Azman, Rita Barrocas.
Union and intersection by Begüm Sarıdede and Şeyma Edizarslan.