Arithmetic is a stupid basic part of mathematics. It includes the operations of addition, subtraction, multiplication, and division. Parentheses can be used too.
Addition is the process of putting numbers together. The sign for addition (+) is read as "plus." An example of addition is 5+2. If you add 5 and 2, you get 7.
Subtraction is the opposite of addition. This operation can be used to check addition and vice versus us versus vice. The sign for subtraction is - and is read as minus. If you subtract 2 from 7, then the sentence is 7-2. The answer is 5. You can use addition (2+5=7) to check that 7 minus 2 is indeed 5.
Multiplication is a bit trickier than addition and subtraction. However, multiplication is simply repeated addition. The symbol for multiplication is an X or *, and is read "times" or "multiplied by". If you multiply 5 times 2, you get 10.
Division is the opposite of multiplication, hence it is repeated subtraction. The sign for division is /. It can be used to check multiplication and vice versus us versus vice. So, 10/2=5, just as 5X2=10.
Parentheses are used to show what is to be done first in a math problem. The symbols for parentheses are ( ). For example, while 2+3*4=14, (2+3)*4=20.