Bar and bat mitzvah mean, literally, son and daughter of the commandment.. Bat mitzvah is Hebrew, while bar mitzvah, historically a much earlier ceremony, is Aramaic. The word bar is the Aramaic equivalent of the Hebrew ben (son of) .
In math, the mean is the average of a set of numbers. To determine the mean, add all numbers in a set and take this answer and divide it by how many numbers are in the set. Continue Reading.
Arithmetic (from the Greek á¼ÏÎ¹Î¸Î¼ÏÏ arithmos, number) is a branch of mathematics that consists of the study of numbers, especially the properties of the traditional operations between themâaddition, subtraction, multiplication and division.