Basic operations

ARITHMETICS

Basic operations

addition
subtraction
multiplication
division

Addition and subtraction on integers:

·        If sign of the numbers match, add the numbers together and keep the  same sign.

Example 1)   -5 + (-1) = -8

                 2)   3 + 4 = 7

·        If the sign does not match, subtract the number and keep the sign of largest number.

Example: 1) -9 + 6  = -3             

                              2)  6 + (-12) = 6

·        For subtraction of two numbers, add the opposite of the number after subtraction sign.

            Example 1)   7 – 10 = 7 + (-10)   = -3      

                            2)   5 - (-3) = 5 + 3 = 8           3)   -9 - (-2) = -7

Multiplication and division:

(+ve) x (+ve) = (+ve)	(+ve) / (+ve) = (+ve)
(-ve) x (-ve) = (+ve)	(-ve) /  (-ve) = (+ve)
(-ve) x (+ve) = (-ve)	(-ve) /  (+ve) = (-ve)
(+ve) x (-ve) = (-ve)	(+ve) / (-ve) = (-ve)