math

Numbers and comparing. Place values. Addition. Subtraction. Understand multiplication. Multiplication skill builders. Multiplication fluency. Multiplication. Understand division. Division skill builders

The history of mathematics can be seen as an ever-increasing series of abstractions. The first abstraction, which is shared by many animals, was probably that of numbers: the realization that a collection of two apples and a collection of two oranges (for example) have something in common, namely quantity of their members.

As evidenced by tallies found on bone, in addition to recognizing how to count physical objects, prehistoric